Journal articles: 'Photoelectrocatalysi'

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Su, Hui Dong, and Hong Lei Du. "Study on Photoelectrocatalytic of Three-Dimensional Electrode Using TiO₂ Coated γ-Al₂O₃ and Scrap Iron Particle Electrode." Applied Mechanics and Materials 71-78 (July 2011): 972–75. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.972.

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Titanium oxide coatings(TiO2/Ti) were formed on the titanium surface by micro-arc oxidation(MAO) in Na3PO4solution.And using the TiO2/Ti as anod electrode, the titanium as counter electrode in the system of three-dimensional electrode.Coated γ- Al2O3(TiO2/γ-Al2O3) that prepared by sol-gel dipcoating method ,and scrap iron mixture as particle electrode, combining with the UV lamp and regulated power supply make up the three-dimensional electrode photoelectrocatalysis system. The photoelectrocatalysis system use 0.02M Na2SO4aqueous solution as supporting electrolyte.The photoelectrocatalytic ability of titanium oxide coatings were evaluated by photoelectrocatalytic degradation of methylene blue aqueous solution.The experiment demonstrate that compare to photoelectrocatalytic degradation of single TiO2/Ti film and only adsorbtion, the photoelectrocatalysis of three-dimensional electrode with coated particle electrode have the synergistic effect with them, which can improve the degradation of methylene blue aqueous solution. When the methylthionine chloride concentration of 5mg/L, cell voltage of 7V. The three-dimensional electrode photoelectrocatalysis degradation of methylene blue compare to traditional two-dimensional plate electrodes which without particle electrode increase 43.35% after 3 hours photoelectrocatalysis.

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Su, Hui Dong, and Hong Lei Du. "Study on Photoelectrocatalytic of Three-Dimensional Electrode Using TiO₂ Coatings Particle Electrode." Advanced Materials Research 156-157 (October 2010): 344–49. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.344.

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Titanium oxide coatings(TiO2/Ti) were formed on the titanium surface by micro-arc oxidation(MAO) in Na3PO4 solution.Using the TiO2/Ti as anod electrode, the titanium as counter electrode.Coated activated carbon(TiO2/AC) that prepared by sol-gel dipcoating method ,and activated carbon mixture as particle electrode,combining with the UV lamp and regulated power supply make up the three-dimensional electrode photoelectrocatalysis system. The photoelectrocatalysis system use Na2SO4 aqueous solution as supporting electrolyte.The photoelectrocatalytic ability of titanium oxide coatings were evaluated by photoelectrocatalytic degradation of methylthionine chloride aqueous solution.The experiment demonstrate that there was photoelectrocatalytic degradation of single TiO2/Ti film or only adsorbtion, the photoelectrocatalysis of three-dimensional electrode with particle electrode have the synergistic effect,which can improve the degradation of methylene blue aqueous solution.The influence of some factors was studied,including initial solution,cell voltage, electrolyte concentration and some other factors.When the methylthionine chloride concentration of 5mg/L, cell voltage of 8V, electrolyte concentration of 0.04M. The three-dimensional electrode photoelectrocatalysis degradation of methylene blue compare to traditional two-dimensional plate electrodes which without particle electrode increase 40.36% after 3 hours photoelectrocatalysis.

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Garcia-Segura, Sergi, Omotayo A. Arotiba, and Enric Brillas. "The Pathway towards Photoelectrocatalytic Water Disinfection: Review and Prospects of a Powerful Sustainable Tool." Catalysts 11, no. 8 (July 29, 2021): 921. http://dx.doi.org/10.3390/catal11080921.

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Photoelectrocatalysis is a hybrid photon/electron-driven process that benefits from the synergistic effects of both processes to enhance and stabilize the generation of disinfecting oxidants. Photoelectrocatalysis is an easy to operate technology that can be scaled-up or scaled-down for various water treatment applications as low-cost decentralized systems. This review article describes the fundamentals of photoelectrocatalysis, applied to water disinfection to ensure access to clean water for all as a sustainable development goal. Advances in reactor engineering design that integrate light-delivery and electrochemical system requirements are presented, with a description of photo-electrode material advances, including doping, nano-decoration, and nanostructure control. Disinfection and cell inactivation are described using different model microorganisms such as E. coli, Mycobacteria, Legionella, etc., as well the fungus Candida parapsilosis, with relevant figures of merit. The key advances in the elucidation of bacterial inactivation mechanisms by photoelectrocatalytic treatments are presented and knowledge gaps identified. Finally, prospects and further research needs are outlined, to define the pathway towards the future of photoelectrocatalytic disinfection technologies.

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Chang, Sujie, Qiangbing Wang, Baishan Liu, Yuanhua Sang, and Hong Liu. "Hierarchical TiO2 nanonetwork–porous Ti 3D hybrid photocatalysts for continuous-flow photoelectrodegradation of organic pollutants." Catalysis Science & Technology 7, no. 2 (2017): 524–32. http://dx.doi.org/10.1039/c6cy02150f.

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Hierarchical TiO₂/porous Ti hybrid photocatalysts prepared by powder metallurgical porous titanium material can be act as 3D electrodes for photoelectrocatalysis. High performance continuous filtration photoelectrocatalytic device for waste water treatment has been designed and built by using UV-LED as light source.

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Montenegro-Ayo, Renato, Juan Carlos Morales-Gomero, Hugo Alarcon, Salvador Cotillas, Paul Westerhoff, and Sergi Garcia-Segura. "Scaling up Photoelectrocatalytic Reactors: A TiO2 Nanotube-Coated Disc Compound Reactor Effectively Degrades Acetaminophen." Water 11, no. 12 (November 28, 2019): 2522. http://dx.doi.org/10.3390/w11122522.

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Multiple discs coated with hierarchically-organized TiO2 anatase nanotubes served as photoelectrodes in a novel annular photoelectrocatalytic reactor. Electrochemical characterization showed light irradiation enhanced the current response due to photogeneration of charge carriers. The pharmaceutical acetaminophen was used as a representative water micropollutant. The photoelectrocatalysis pseudo-first-order rate constant for acetaminophen was seven orders of magnitude greater than electrocatalytic treatment. Compared against photocatalysis alone, our photoelectrocatalytic reactor at <8 V reduced by two fold, the electric energy per order (EEO; kWh m−3 order−1 for 90% pollutant degradation). Applying a cell potential higher than 8 V detrimentally increased EEO. Acetaminophen was degraded across a range of initial concentrations, but absorbance at higher concentration diminished photon transport, resulting in higher EEO. Extended photoelectrocatalytic reactor operation degraded acetaminophen, which was accompanied by 53% mineralization based upon total organic carbon measurements. This proof of concept for our photoelectrocatalytic reactor demonstrated a strategy to increase photo-active surface area in annular reactors.

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Guan, Yu Jiang, Zi Bo Wang, Shu Li Bai, and Qin Xue. "Photoelectrocatalytic Degradation of HCB by N-Doped TiO₂ Nanotube Arrays." Advanced Materials Research 652-654 (January 2013): 1580–84. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.1580.

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N-doped Titanium dioxide (TiO2) nanotube arrays were characterized by scanning electron microscope (SEM)，X-ray Diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) to analyse its surface morphology, crystal types and the doping behavior of nitrogen. The material was used as electrode for photoelectrocatalytic degradation of hexachlorobenzen under irradiation of simulated sunlight. The effects of photocatalysis, electrocatalysis, photoelectrocatalysis, the concentration of Na2SO4 and pH value on degradation of HCB were investigated.

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Purnawan, Candra, Sayekti Wahyuningsih, and Vaishnavita Nawakusuma. "Methyl Violet Degradation Using Photocatalytic and Photoelectrocatalytic Processes Over Graphite/PbTiO3 Composite." Bulletin of Chemical Reaction Engineering & Catalysis 13, no. 1 (April 2, 2018): 127. http://dx.doi.org/10.9767/bcrec.13.1.1354.127-135.

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Photocatalytic and photoelectrocatalytic degradation of methyl violet dye using Graphite/PbTiO3 composites has been conducted. The purposes of this research were to examine photocatalytic and photoelectrocatalytic degradation of methyl violet using Graphite/PbTiO3 composite. Synthesis of Graphite/PbTiO3 composite was successfully performed via sol-gel method by mixing graphite powder, titanium tetra isopropoxide precursor solution (TTIP) and Pb(NO3)2. The Graphite/PbTiO3 composites were characterized using X-Ray Diffraction (XRD), Fourier Transform-Infra Red (FT-IR), and Scanning Electron Microscopy (SEM). The XRD diffractogram and IR spectrum of Graphite/PbTiO3 composite revealed all characteristic peak of graphite and PbTiO3. Photocatalytic degradation process showed that Graphite/PbTiO3 composite with ratio 1/1 decreased concentrations of methyl violet up to 92.20 %. While photoelectrocatalytic degradation processed for 30 minutes at neutral pH and 10 V voltage degraded the methyl violet until 94 %. However, the photoelectrocatalysis is still not significance to improve methyl violet degradation compared with photocatalysis. Copyright © 2018 BCREC Group. All rights reservedReceived: 19th July 2017; Revised: 8th September 2017; Accepted: 8th September 2017; Available online: 22nd January 2018; Published regularly: 2nd April 2018How to Cite: Purnawan, C., Wahyuningsih, S., Nawakusuma, V. (2018). Methyl Violet Degradation Using Photocatalytic and Photoelectrocatalytic Processes Over Graphite/PbTiO3 Composite. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (1): 127-135 (doi:10.9767/bcrec.13.1.1354.127-135)

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Zhou, Xiao, Yongxin Zheng, Juan Zhou, and Shaoqi Zhou. "Degradation Kinetics of Photoelectrocatalysis on Landfill Leachate Using Codoped TiO2/Ti Photoelectrodes." Journal of Nanomaterials 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/810579.

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The photoelectrocatalytic (PEC) oxidation degradation of landfill leachate rejected by reverse osmosis (RO) using a Cu/N codoped TiO2/Ti photoelectrode was kinetically investigated in terms of COD concentration. The key factors affecting the reaction rate of PEC oxidation and the removal efficiency of COD concentration were studied, including the COD concentration of landfill leachate, potential bias applied, pH value of landfill leachate, and the reaction temperature of photoelectrocatalytic reactor. The apparent kinetic model was applied to describe the photoelectrocatalysis reaction. The results showed that the kinetic equation for photoelectrocatalytic oxidation of landfill leachate was fitting well with the experimental data (R2=0.967~0.998), with average activation energyEa=6.35 × 104 J·mol−1. It was found that there was an optimal bias voltage of 20 V and low pH value was favorable for COD removal in landfill leachate. The reaction order of initial COD concentration (1.326) is higher than that of potential bias (1.102) and pH value (0.074), which indicates that the reaction rate can be controlled efficiently through adjusted initial concentration. The experiments demonstrated that potential bias would approach its statured value with increasing potential bias.

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Chen, Hongchong, Jinhua Li, Quanpeng Chen, Di Li, and Baoxue Zhou. "Photoelectrocatalytic Performance of Benzoic Acid onTiO2Nanotube Array Electrodes." International Journal of Photoenergy 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/567426.

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The photoelectrocatalytic performance of benzoic acid on TiO2nanotube array electrodes was investigated. A thin-cell was used to discuss the effect of the bias voltage, illumination intensity, and electrolyte concentration on the photoelectrocatalytic degradation efficiency of benzoic acid. The photogenerated current-time (I-t) profiles were found to be related to the adsorption and the degradation process. The relationship between the initial concentration and the photocurrent peaks (I0ph) fits the Langmuir-type adsorption model, thus confirming that the adsorption of benzoic acid on TiO2nanotube arrays (TNAs) was single monolayer adsorption. At low concentrations, theI-tprofiles simply decay after the initial transient peak due to the sufficient holes on the TNAs which would oxidize the benzoic acid quickly. However, theI-tprofiles varied with increasing benzoic acid concentrations because the rate of diffusion in the bulk solution and the degradation of the intermediate products affect the photoelectrocatalysis on the electrode surface.

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Hou, Gui Qin, Wen Li Zhang, Shui Jing Gao, and Xiao Yan Wang. "Study on the Influence Factors of ZnFe₂O₄ and TiO₂ Composite Films Photoelectrocatalytic Properties." Advanced Materials Research 287-290 (July 2011): 2199–202. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.2199.

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The ZnFe2O4 and TiO2 nanocomposite films was prepared by Sol-Gel method on conductive glass, and the influence factors of it’s photoelectrocatalytic performence such as the film layer, pole and voltage was investigated. The results indicated that: the photocatalytic effects of composite films with ZnFe2O4+ TiO2+ ZnFe2O4 was the best. The decomposing ratio of methyl orange with the photoelectrocatalysis of composite films at voltage 0.2-6V all increased unstably.At the same time, the distance from films to pole plank also had the effects on the photocatalytic activities of the films.

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Mahhumane, Nondumiso, Leskey M. Cele, Charles Muzenda, Oluchi V. Nkwachukwu, Babatunde A. Koiki, and Omotayo A. Arotiba. "Enhanced Visible Light-Driven Photoelectrocatalytic Degradation of Paracetamol at a Ternary z-Scheme Heterojunction of Bi2WO6 with Carbon Nanoparticles and TiO2 Nanotube Arrays Electrode." Nanomaterials 12, no. 14 (July 19, 2022): 2467. http://dx.doi.org/10.3390/nano12142467.

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In this study, a ternary z-scheme heterojunction of Bi2WO6 with carbon nanoparticles and TiO2 nanotube arrays was used to remove paracetamol from water by photoelectrocatalysis. The materials and z-scheme electrode were characterised using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), EDS mapping, ultraviolet diffuse reflection spectroscopy (UV-DRS), photocurrent measurement, electrochemical impedance spectroscopy (EIS), uv-vis spectroscopy and total organic carbon measurement (TOC). The effect of parameters such as current density and pH were studied. At optimal conditions, the electrode was applied for photoelectrocatalytic degradation of paracetamol, which gave a degradation efficiency of 84% within 180 min. The total organic carbon removal percentage obtained when using this electrode was 72%. Scavenger studies revealed that the holes played a crucial role during the photoelectrocatalytic degradation of paracetamol. The electrode showed high stability and reusability therefore suggesting that the z-scheme Bi2WO6-CNP-TiO2 nanotube arrays electrode is an efficient photoanode for the degradation of pharmaceuticals in wastewater.

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Syahrir, Syahrir, Muh Nurdin, and La Ode Ahmad Nur Ramadhan. "Sensor Chemical Oxygen Demand (COD) Berbasis TiO2/Ti Sebagai Elektroda Kerja Untuk Mendeteksi Rhodamine B." BioWallacea : Jurnal Penelitian Biologi (Journal of Biological Research) 7, no. 1 (May 5, 2020): 1027. http://dx.doi.org/10.33772/biowallacea.v7i1.11066.

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Photoelectrocatalytic degradation towards rhodamine B (RhB) organic compound has been conducted by using TiO2/Ti as the working electrode. The preparation of TiO2/Ti working electrode was conducted by using anodizing method to compare the data related to the activity of the electrodes. The results showed that TiO2/Ti electrodes was able to change the surface morphology of the electrodes to become more homogeneous. From the test results photoelectrocatalysis activity was obtained at a COD value of 20.40 mL/L which occurred in RhB dyes with an initial concentration of 10 mg/L. Keywords: photoelectrocatalysis, degradation, rhodamine B, TiO2/Ti. ABSTRAK Degradasi secara fotoelektrokatalitik senyawa organik rhodamine B (RhB) telah dilakukan dengan menggunakan TiO2/Ti sebagai elektroda kerja. Penyusunan elektroda kerja TiO2/Ti disiapkan dengan menggunakan metode anodasi untuk membandingkan data yang berkaitan dengan aktivitas elektroda. Hasil penelitian menunjukkan bahwa elektroda TiO2/Ti mampu mengubah morfologii permukaan elektroda menjadi lebih homogen. Dari hasil uji aktifitas fotoelektrokatalisis diperoleh pada nilai COD 20,40 mL/L yang terjadi pada zat warna RhB dengan konsentrasi awal 10 mg/LKata Kunci: fotoelektrokatalisis, degradasi, rhodamin B, TiO2/Ti.

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Alves, Nayara de Araujo, Diego N. David Parra, Celso Xavier Cardoso, Marcelo Rodrigues da Silva Pelissari, and Marcos F. S. Teixeira. "INVESTIGAÇÃO DOS PARÂMETROS FOTOELETROCATALÍTICOS DO m-BiVO4 NA OXIDAÇÃO DE GLICOSE." Colloquium Exactarum, Vol.11 N.4 11, no. 4 (December 17, 2019): 131–41. http://dx.doi.org/10.5747/ce.2019.v11.n4.e302.

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This work aims to evaluate the behavior of the FTO/m-BiVO4 photoanode in different electrolytes, pH, anions and cations, in order to investigate the influence of these parameters on their photoelectrochemical activity. The m-BiVO4semiconductor was developed by combustion synthesis in solution (SCS) and deposited by dip-coating technique on fluorinated doped tin oxide (FTO) coated glass substrate. The evaluation of the photosensitive behavior of the film was made by linear voltammetry and chronoamperometry in the presence of pulsed visible light. After photoelectrochemical parameters optimization, the study of photoelectrocatalysis in glucose degradation was performed. Thus, it was possible to evaluate the efficiency of the film in the photoelectrocatalytic processes, presenting itself as a potential material for such applications.

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Lopez, Edgar Clyde R., Nicole Elyse B. Saputil, Lance A. Loza, Fiona Fritz G. Camiguing, Marlon L. Mopon Jr., and Jem Valerie D. Perez. "Fe/S Co-Doped Titanium Dioxide Nanotubes: Optimization of the Photoelectrocatalytic Degradation Kinetics of Phenol Red." Key Engineering Materials 891 (July 6, 2021): 49–55. http://dx.doi.org/10.4028/www.scientific.net/kem.891.49.

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Photoelectrocatalysis has emerged as a promising technology to degrade recalcitrant pollutants such as textile dyes in wastewater completely. Titanium dioxide is typically used as a photocatalyst, but its wide bandgap constrains its use to the use of ultraviolet light. To extend its use to the visible-light region, we doped titanium dioxide nanotubes with iron and sulfur. We used them as a photoelectrode for the photoelectrocatalytic degradation of a model pollutant – phenol red. Response surface methodology using a Box-Behnken design of experiments was used to investigate the effects of initial dye concentration, applied potential, and dopant loading on phenol red degradation kinetics. Statistical analysis showed that our reduced cubic model adequately correlates these parameters. The fastest dye degradation rate was achieved at the optimized conditions: initial phenol red concentration = 5.0326 mg L-1, applied voltage = 29.9686 V, and dopant loading = 1.2244 wt.%. Complete degradation of phenol red may be achieved after 11.77 hours of treatment under the optimized conditions in a batch reactor. Our model's robustness enables it to be used for process modeling and a basis for designing scaled-up photoelectrocatalytic reactors.

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Song, Yanfang, Wei Chen, Wei Wei, and Yuhan Sun. "Advances in Clean Fuel Ethanol Production from Electro-, Photo- and Photoelectro-Catalytic CO2 Reduction." Catalysts 10, no. 11 (November 5, 2020): 1287. http://dx.doi.org/10.3390/catal10111287.

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Using renewable energy to convert CO2 to a clean fuel ethanol can not only reduce carbon emission through the utilization of CO2 as feedstock, but also store renewable energy as the widely used chemical and high-energy-density fuel, being considered as a perfect strategy to address current environment and energy issues. Developing efficient electrocatalysts, photocatalysts, and photoelectrocatalysts for CO2 reduction is the most crucial keystone for achieving this goal. Considerable progresses in CO2-based ethanol production have been made over the past decades. This review provides the general principles and summarizes the latest advancements in electrocatalytic, photocatalytic and photoelectrocatalytic CO2 conversion to ethanol. Furthermore, the main challenges and proposed future prospects are illustrated for further developments in clean fuel ethanol production.

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Lopez, Edgar Clyde R., Nicole Elyse B. Saputil, Lance A. Loza, Fiona Fritz G. Camiguing, Marlon Jr L. Mopon, and Jem Valerie D. Perez. "Iron/Sulfur Co-Doped Titanium Dioxide Nanotubes: Optimization of the Photoelectrocatalytic Degradation of Phenol Red under Visible Light." Key Engineering Materials 847 (June 2020): 95–101. http://dx.doi.org/10.4028/www.scientific.net/kem.847.95.

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Photoelectrocatalysis is a rapidly developing technology for degrading recalcitrant organic compounds in wastewater due to its ability to overcome electron-hole recombination. Herein, we synthesized Fe/S co-doped TiO2 nanotubes through an in-situ anodization technique. We developed a simple reduced quadratic model based on response surface modeling which can be used to adequately correlate the operating parameters with the photoelectrocatalytic performance of Fe/S-TiNTs in degrading phenol red. Predicted maximum dye degradation of 54.78% was achieved by the generated model using the optimized parameters: initial phenol red concentration = 5.22 mg L-1, applied voltage = 27.4 V, and dopant loading = 2.97 wt.%. Upon validation, experimental maximum phenol degradation of 53.24% was obtained, which agrees well with the predicted value within statistical significance. Overall, our model can be potentially used for process optimization within the design space studied.

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Azis, Thamrin, Maulidiyah Maulidiyah, Muhammad Nurdin, Muh Zakir Muzakkar, Ratna, La Ode Abd Kadir, Viesta Valentin Octavian, T. Nurwahida, C. Bijang, and Haris W. "Studi dan Aplikasi Elektroda FeTiO3-TiO2/Ti untuk Degradasi Reactive Blue 160 dengan Metode Fotoelektrokatalisis." KOVALEN: Jurnal Riset Kimia 7, no. 2 (September 1, 2021): 121–30. http://dx.doi.org/10.22487/kovalen.2021.v7.i2.15561.

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The manufacture of titanium dioxide (TiO2) electrodes is made by anodizing method and coated with ilmenite (FeTiO3) through a dip-coating technique. The ilmenite (FeTiO3) coated TiO2/Ti plate electrode was developed for the degradation of the reactive blue 160 dye under photoelectrocatalytic UV and Visible light irradiation. The performance of FeTiO3-TiO2 / Ti composites degrades reactive blue 160 under UV irradiation and is visible photoelectrocatalytically compared to TiO2. The results of XRD characterization of TiO2 crystals in the form of anatase at 2θ, namely 35.1 ° (110), and the substitution of Fe dopant on TiO2 in the form of anatase and rutile crystals. FTIR data indicated the presence of Fe-O bonds at wave numbers <700 nm. SEM-EDX results showed a thin layer of FeTiO3 was formed, indicating that the dip-coating method was effective in the coating process. The performance of the FeTiO3-TiO2 / Ti electrode has the highest activity against the oxidation process under visible light than the TiO2/Ti electrode. The results of degradation of reactive blue 160 dye with a concentration of 0.5 ppm by photoelectrocatalytic showed that the TiO2 / Ti and FeTiO3-TiO2/Ti electrodes were active in visible irradiation with degradation rate constants of 48% and 69%. Keywords: Electrodes, ilmenite, TiO2 / Ti, degradation, reactive blue 160, photoelectrocatalysis

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Pei, Jianye, and Lihua Bi. "Application of Composite Film Containing Polyoxometalate Ni25 and Reduced Graphene Oxide for Photoelectrocatalytic Water Oxidation." Catalysts 12, no. 7 (June 24, 2022): 696. http://dx.doi.org/10.3390/catal12070696.

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The preparation of clean energy is an effective way to solve the global energy crisis and reduce environmental pollution. The decomposition of water can produce hydrogen and oxygen, which is one of the effective ways to prepare clean energy. However, water oxidation is a bottleneck for water decomposition, thus, developing a water oxidation catalyst can accelerate the process of water decomposition to generate clean energy. Nickel-substituted polyoxometalate [Ni25(H2O)2(OH)18(CO3)2(PO4)6(SiW9O34)6]50− (Ni25) is proven as an excellent water oxidation photocatalyst. To develop the effective photoelectrocatalyst for water oxidation, in this work, we constructed two composite films containing Ni25 on ITO, [PDDA/Ni25]n, and PDDA/[Ni25/(PDDA–rGO)]n, by layer-by-layer self-assembly, which is the first combination of nickel-substituted polyoxometalates and reduced graphene oxide (rGO). The study on the photoelectrocatalytic performance of the two films indicates that the water oxidation current of the film PDDA/[Ni25/(PDDA–rGO)]n-modified electrode is increased by 33.7% after light irradiation, which is 1.71 times that of the film [PDDA/Ni25]n-modified electrode. Moreover, the transient photocurrent response of the film PDDA/[Ni25/(PDDA–rGO)]n-modified electrode demonstrates that there is a synergistic effect between rGO and Ni25, and rGO-accelerated electron transport and inhibited charge recombination. In addition, the film PDDA/[Ni25/(PDDA–rGO)]n-modified electrode exhibits good stability, indicating its great potential as an effective photoelectrocatalyst for water oxidation in practical application.

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Mais, Laura, Simonetta Palmas, Michele Mascia, and Annalisa Vacca. "Effect of Potential and Chlorides on Photoelectrochemical Removal of Diethyl Phthalate from Water." Catalysts 11, no. 8 (July 22, 2021): 882. http://dx.doi.org/10.3390/catal11080882.

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Removal of persistent pollutants from water by photoelectrocatalysis has emerged as a promising powerful process. Applied potential plays a key role in the photocatalytic activity of the semi-conductor as well as the possible presence of chloride ions in the solution. This work aims to investigate these effects on the photoelectrocatalytic oxidation of diethyl phthalate (DEP) by using TiO2 nanotubular anodes under solar light irradiation. PEC tests were performed at constant potentials under different concentration of NaCl. The process is able to remove DEP following a pseudo-first order kinetics: values of kapp of 1.25 × 10−3 min−1 and 1.56 × 10−4 min−1 have been obtained at applied potentials of 1.8 and 0.2 V, respectively. Results showed that, depending on the applied potential, the presence of chloride ions in the solution affects the degradation rate resulting in a negative effect: the presence of 500 mM of Cl− reduces the value of kapp by 50 and 80% at 0.2 and 1.8 V respectively.

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Guru, Sruthi, and G. Ranga Rao. "Review—Strategic Design of Layered Double Hydroxides and Graphitic Carbon Nitride Heterostructures for Photoelectrocatalytic Water Splitting Applications." Journal of The Electrochemical Society 169, no. 4 (April 1, 2022): 046515. http://dx.doi.org/10.1149/1945-7111/ac65b8.

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The layered double hydroxides/graphitic carbon nitride (LDH/g-C3N4) heterostructures stand as promising photo- and electro-catalysts for water oxidation and reduction. These materials containing metal ions M p + a n d M ′ q + , represented as M p + M ′ q + − LDH / g ‐ C 3 N 4 , have unique advantages over single component catalysts. This review provides the necessary insights on the material selection and mechanisms involved in electrocatalytic, photocatalytic, and photoelectrocatalytic water splitting processes. The importance of heterojunctions and interfacial chemistry in the water splitting mechanism is explained in detail by taking CuTi-LDH@g-C3N4 and Bi2O2CO3/NiFe-LDH@g-C3N4 as examples. There is a synergistic effect between g-C3N4 and LDH layers that improves the performance of the hybrid materials over individual catalysts. This effect is due to the formation of Type II heterojunction in CuTi-LDH@g-C3N4 for oxygen evolution reaction, and of S-scheme mechanism in Bi2O2CO3/NiFe-LDH@g-C3N4 for both hydrogen and oxygen evolution reactions. Comparison of these two photoelectrocatalysts reveals new insights related to the role of synthesis method (hydrothermal vs coprecipitation), surface active sites (binary vs ternary heterostructures) and type of heterojunctions (Type II vs S-scheme), specifically, in the photoelectrocatalytic oxygen evolution reaction. These insights pave the way for further research in such multi-component hybrid materials to augment the progress in designing highly efficient heterogeneous photo/electro-catalysts for generating renewable fuels.

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Borrás-Jiménez, Daniel, Wilber Silva-López, and César Nieto-Londoño. "Towards the Configuration of a Photoelectrocatalytic Reactor: Part 1—Determination of Photoelectrode Geometry and Optical Thickness by a Numerical Approach." Nanomaterials 12, no. 14 (July 12, 2022): 2385. http://dx.doi.org/10.3390/nano12142385.

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Photoelectrocatalysis has been highlighted as a tertiary wastewater treatment in the textile industry due to its high dye mineralisation capacity. However, design improvements are necessary to overcome photo-reactors limitations. The present work proposes a preliminary configuration of a photoelectrocatalytic reactor to degrade Reactive Red 239 (RR239) textile dye, using computational fluid dynamics (CFD) to analyse the mass transfer rate, radiation intensity loss (RIL), and its effect on kinetics degradation, over a photoelectrode based on a TiO2 nanotube. A study to increase the space-time yield (STY) was carried out through mass transfer rate and kinetic analysis, varying the optical thickness (δ) between the radiation entrance and the photocatalytic surface, photoelectrode geometry, inlet flow rate, and the surface radiation intensity. The RIL was determined using a 1D Beer–Lambert-based model, and an extinction coefficient experimentally determined by UV-Vis spectroscopy. The results show that in RR239 solutions below concentrations of 6 mg/L, a woven mesh photoelectrode and an optimal optical thickness δ of 1 cm is enough to keep the RIL below 15% and maximise the mass transfer and the STY in around 110 g/m3-day.

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Xiong, Mingwen, Ying Tao, Lanlan Fu, Donglai Pan, Yuxin Shi, Tong Hu, Jiayu Ma, Xiaofeng Chen, and Guisheng Li. "UV-Visible-Near-Infrared-Driven Photoelectrocatalytic Urea Oxidation and Photocatalytic Urea Fuel Cells Based on Ruddlensden–Popper-Type Perovskite Oxide La2NiO4." Catalysts 13, no. 1 (December 27, 2022): 53. http://dx.doi.org/10.3390/catal13010053.

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Photocatalysis and photoelectrocatalysis, as green and low-cost pollutant treatment technologies, have been widely used to simultaneously degrade pollutants and produce clean energy to solve the problems of environmental pollution and energy crisis. However, the disadvantages of photocatalysts in a narrow absorption range and low utilization rate of solar energy still hinder the practical application. Here we fabricate two-dimensional porous Ruddlensden–Popper type nickel-based perovskite oxide La2NiO4 as a noble metal-free photoanode for photoelectrocatalytic urea oxidation under full spectrum sunlight irradiation. The transient photocurrent density under near infrared (NIR) light (λ > 800 nm) can reach 50 μA cm−2. Urea wastewater was used as the fuel to obtain low-energy hydrogen production, and round-the-clock hydrogen production was achieved with the optimal yield of 22.76 μmol cm−2 h−1. Moreover, a photocatalytic urea fuel cell (PUFC) was constructed with La2NiO4 as the photoanode. The power density under UV-vis-NIR was 0.575 μW cm−2. Surprisingly, the filling factor (FF) under NIR light was 0.477, which was much higher than those under UV-vis-NIR and visible light. The results demonstrated that PUFCs constructed from low-cost nickel-based perovskite oxides have potential applications for low-energy hydrogen production and efficient utilization of sunlight.

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Talbi, L., I. Bozetine, S. Anas Boussaa, K. Benfadel, D. Allam, N. Rahim, Y. Ould Mohamed, et al. "Photoelectrochemical properties of Cu₂O/PANI/Si-based photocathodes destined for CO₂ conversion." Emerging Materials Research 12, no. 1 (March 1, 2023): 1–11. http://dx.doi.org/10.1680/jemmr.22.00167.

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The present study was aimed to convert CO2 into value-added products such as methanol which not only could address the potential solution for controlling the CO2 concentration level in the atmosphere but also can offer an alternative approach for the production of renewable energy sources. In this perspective, various hybrid photoelectrocatalysts were synthesized, characterized and used as photocathodes for photoelectrocatalytic (PEC) reduction of CO2 to methanol in aqueous medium under visible light irradiation. Flat silicon (Siflat) and pyramidal textured silicon (SiPY) substrates, covered with polyaniline (PANI) with or without sensitization with copper oxide (Cu2O) particles were investigated. It was noticed that the combination of PANI and Cu2O greatly increased the PEC CO2 reduction to methanol owing to enhance the CO2 chemisorption capacity by the photocathode surface and at the same time facilitated the separation of photogenerated electron-hole (e−/h+) pairs. The PEC results demonstrated that the applied potential impacts the photocurrent stability. The sensitization with Cu2O effectively separate the photogenerated e−/h+ pairs and therefore, enhanced the PEC CO2 reduction activity of the hybrid photocatalyst. The best Faradaic efficiency (FE) for methanol formation reached 57.66 % which was recorded when Cu2O/PANI/SiPY heterostructure was used as photocathode at applied potential of −1.2V vs SCE.

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Meng, Hui-Shan, Yang Liu, Peng-Xi Liu, Lu-Lu Zhou, Chen Chen, Wei-Kang Wang, and Juan Xu. "Development of a three-dimensional photoelectrocatalytic reactor packed with granular sludge carbon photoelectrocatalyst for efficient wastewater treatment." Separation and Purification Technology 277 (December 2021): 119642. http://dx.doi.org/10.1016/j.seppur.2021.119642.

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Adamopoulos, Panagiotis Marios, Ioannis Papagiannis, Dimitrios Raptis, and Panagiotis Lianos. "Photoelectrocatalytic Hydrogen Production Using a TiO2/WO3 Bilayer Photocatalyst in the Presence of Ethanol as a Fuel." Catalysts 9, no. 12 (November 21, 2019): 976. http://dx.doi.org/10.3390/catal9120976.

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Photoelectrocatalytic hydrogen production was studied by using a photoelectrochemical cell where the photoanode was made by depositing on FTO electrodes either a nanoparticulate WO3 film alone or a bilayer film made of nanoparticulate WO3 at the bottom covered with a nanoparticulate TiO2 film on the top. Both the electric current and the hydrogen produced by the photoelectrocatalysis cell substantially increased by adding the top titania layer. The presence of this layer did not affect the current-voltage characteristics of the cell (besides the increase of the current density). This was an indication that the flow of electrons in the combined semiconductor photoanode was through the WO3 layer. The increase of the current was mainly attributed to the passivation of the surface recombination sites on WO3 contributing to the limitation of charge recombination mechanisms. In addition, the top titania layer may have contributed to photon absorption by back scattering of light and thus by enhancement of light absorption by WO3. Relatively high charge densities were recorded, owing both to the improvement of the photoanode by the combined photocatalyst and to the presence of ethanol as the sacrificial agent (fuel), which affected the recorded current by “current doubling” phenomena. Hydrogen was produced under electric bias using a simple cathode electrode made of carbon paper carrying carbon black as the electrocatalyst. This electrode gave a Faradaic efficiency of 58% for hydrogen production.

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Franz, Silvia, Ermelinda Falletta, Hamed Arab, Sapia Murgolo, Massimiliano Bestetti, and Giuseppe Mascolo. "Degradation of Carbamazepine by Photo(electro)catalysis on Nanostructured TiO2 Meshes: Transformation Products and Reaction Pathways." Catalysts 10, no. 2 (February 1, 2020): 169. http://dx.doi.org/10.3390/catal10020169.

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Carbamazepine (CBZ) is a pharmaceutical compound recalcitrant to conventional wastewater treatment plants and widely detected in wastewater bodies. In the present study, advanced oxidation processes for carbamazepine removal are investigated, with particular regard to the degradation pathways of carbamazepine by photoelectrocatalysis and conventional photocatalysis. Photoelectrocatalysis was carried out onto TiO2 meshes obtained by Plasma Electrolytic Oxidation, a well-known technique in the field of industrial surface treatments, in view of an easy scale-up of the process. By photoelectrocatalysis, 99% of carbamazepine was removed in 55 min while only 65% removal was achieved by photolysis. The investigation of the transformation products (TPs) was carried out by means of UPLC-QTOF/MS/MS. Several new TPs were identified and accordingly reaction pathways were proposed. Above 80 min the transformation products disappear, probably forming organic acids of low-molecular weight as final degradation products. The results demonstrated that photoelectrocatalysis onto TiO2 meshes obtained by plasma electrolytic oxidation is a useful alternative to common advanced oxidation processes as wastewater tertiary treatment aimed at removing compounds of emerging concern.

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Tomaz, Alveriana Tagarro, Carla Regina Costa, Maria de Lourdes S. Vasconcellos, Rolando Pedicini, and Josimar Ribeiro. "Evaluation of Photoelectrocatalysis with Electrode Based on Ti/RuO2-TiO2 Modified with Tin and Tantalum Oxides for the Degradation of Indigo Blue Dye." Nanomaterials 12, no. 23 (December 4, 2022): 4301. http://dx.doi.org/10.3390/nano12234301.

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Indigo Blue (IB) is a dye widely used by the textile sector for dyeing cellulose cotton fibers and jeans, being considered a recalcitrant substance, and therefore resistant to traditional treatments. Several methodologies are reported in the literature for the removal or degradation of dyes from the aqueous medium, among which photoelectrocatalysis stands out, which presents promising results in the degradation of dyes when a dimensionally stable anode (DSA) is used as a photoanode. In the present work, we sought to investigate the efficiency of a Ti/RuO2-TiO2 DSA modified with tin and tantalum for the degradation of Indigo Blue dye by photoelectrocatalysis. For this, electrodes were prepared by the thermal decomposition method and then a physical–chemical and electrochemical analysis of the material was carried out. The composition Ti/RuO2-TiO2-SnO2Ta2O5 (30:40:10:20) was compared to Ti/RuO2-TiO2 (30:70) in the photocatalysis, electrocatalysis, and photoelectrocatalysis tests. The photocatalysis was able to degrade only 63% of the IB at a concentration of 100 mg L−1 in 3 h, whereas the electrocatalysis and photoelectrocatalysis were able to degrade 100% of the IB at the same initial concentration in 65 and 60 min, respectively.

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Kim, Hak-Soo, Eun-Ah Lee, Ju-Hyeon Lee, Chul-Hee Han, Jin-Wook Ha, and Yong-Gun Shul. "Discharge photoelectrocatalytic system for the degradation of aromatics." International Journal of Photoenergy 5, no. 1 (2003): 3–6. http://dx.doi.org/10.1155/s1110662x03000035.

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We have introduced the discharge photoelectrocatalytic system, in whichTiO2thin film coating on aluminum plate is subjected simultaneously to both UV irradiation and high voltages in excess of 3000 volts. Due to high voltagesO3is generated; however, efficient removal ofO3is observed in this photoelectrocatalytic system. In terms of the removal of volatile organic compounds (VOCs), the discharge photoelectrocatalytic system has been applied to the removal of aromatic compounds such as benzene and toluene. Based on the experimental data, the rates of the removal of these compounds in this system are higher compared to either the discharge—only system (without the photocatalyst) or the photocatalyst—only system (without high voltage discharge), and the higher rates of degradation of these compounds in the photoelectrocatalytic system are attributed to the reduced rate of electron-hole recombination inTiO2.

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ZHOU Yujian, 周玉鉴, 杨雪 YANG Xue, 杨继凯 YANG Jikai, 聂德财 NIE Decai, 于舒睿 YU Shurui, 肖楠 XIAO Nan, 侯志鹏 HOU Zhipeng, et al. "WO3/Pt复合薄膜的制备及其光电催化性能." ACTA PHOTONICA SINICA 50, no. 3 (2021): 201. http://dx.doi.org/10.3788/gzxb20215003.0331002.

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Qi, Fanjing, Yibing Li, Yanbin Wang, Yan Wang, Shanshan Liu, and Xu Zhao. "Ag-Doped g-C3N4 film electrode: fabrication, characterization and photoelectrocatalysis property." RSC Advances 6, no. 84 (2016): 81378–85. http://dx.doi.org/10.1039/c6ra17613e.

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Ag-Doped graphitic carbon nitride films with high photoelectrocatalytic activities and a proposed mechanism of the photoelectrocatalytic degradation of MB with the Ag/g-C₃N₄ (1 : 10) photoanode.

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Han, Yan He, and Jia Qing Chen. "Screening Effect of Phosphate on Photoelectrocatalytic Activity of TiO₂ Electrode." Advanced Materials Research 953-954 (June 2014): 1099–104. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.1099.

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Although the effect of phosphate on photocatalytic activity of TiO2is extensively investigated, its effect on the photoelectrocatalytic activity of TiO2electrode is not clear. The effect of phosphate on photoelectrocatalytic oxidation of water and organics on the TiO2electrode were investigated in this study. Phosphate has a sophisticated influence on the photoelectrocatalytic oxidation of water on TiO2electrode. The photoelectrocatalytic oxidation of water was inhibited at the low phosphate concentration (<5 μM) while improved at the high concentration. However, phosphate has an adverse influence on the photoelectrocatalytic oxidation of whether the strong or not the weak adsorption organics on the TiO2electrode, which is different from its effect on photocatalytic process of organics on the TiO2slurry, in which the photocatalytic oxidation of the weak adsorption organics is enhanced. However, phosphate can improve the linear concentration range of organics, especially strong adsorption organics (e.g. KHP, 0-333 μM for without phosphate to 0-500 μM for the with 1 M phosphate). Moreover, it is unanimously consent that phosphate has a very strong acid-base buffer capacity. These properties provide an excellent potential for phosphate application during the detection of practical samples, especially the acid and/or base samples.

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Chang, Chen-Yu, Yung-Hsu Hsieh, and Yu-Ying Chen. "Photoelectrocatalytic Degradation of Sodium Oxalate by TiO2/Ti Thin Film Electrode." International Journal of Photoenergy 2012 (2012): 1–6. http://dx.doi.org/10.1155/2012/576089.

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The photocatalytically active TiO2thin film was deposited on the titanium substrate plate by chemical vapor deposition (CVD) method, and the photoelectrocatalytic degradation of sodium oxalate was investigated by TiO2thin film reactor prepared in this study with additional electric potential at 365 nm irradiation. The batch system was chosen in this experiment, and the controlled parameters were pH, different supporting electrolytes, applied additional potential, and different electrolyte solutions that were examined and discussed. The experimental results revealed that the additional applied potential in photocatalytic reaction could prohibit recombination of electron/hole pairs, but the photoelectrocatalytic effect was decreased when the applied electric potential was over 0.25 V. Among the electrolyte solutions added, sodium sulfate improved the photoelectrocatalytic effect most significantly. At last, the better photoelectrocatalytic degradation of sodium oxalate occurred at pH 3 when comparing the pH influence.

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Wang, Dejun, Hui Li, Xiren Jiang, Chaocheng Zhao, and Yuhui Zhao. "Comparison of Three Catalytic Processes in Degradation of HPAM by tBu-TPyzPzCo." Catalysts 11, no. 2 (January 29, 2021): 181. http://dx.doi.org/10.3390/catal11020181.

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The present study describes a two-step synthesis process for the cobalt complex of tetra-2,3-(5,6-di-tert-butyl-pyrazino) porphyrazine (tBu-TPyzPzCo). The product was ultrasonically impregnated onto carbon black (CB) to prepare a supported catalyst (tBu-TPyzPzCo/CB). We built a split photoelectric catalytic device to test the performance of photocatalytic, electrocatalytic and photoelectrocatalytic degradation of partially hydrolyzed polyacrylamide (HPAM). The results confirm that HPAM exhibited more efficient degradation in the presence of a supporting catalyst using the photoelectrocatalytic process than by photocatalytic or electrocatalytic oxidation—or even the sum of the two in saline water. The photoelectrocatalytic reaction confirmed that the process conforms to quasi-first order reaction kinetics, while the reaction rate constants were 6.03 times that of photocatalysis and 3.97 times that of electrocatalysis. We also compared the energy consumption of the three processes and found that the photoelectrocatalytic process has the highest energy efficiency.

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Marugán, Javier, Rafael van Grieken, Cristina Pablos, Cristina Adán, and Ruud Timmers. "Determination of Photochemical, Electrochemical and Photoelectrochemical Efficiencies in a Photoelectrocatalytic Reactor." International Journal of Chemical Reactor Engineering 11, no. 2 (June 20, 2013): 787–97. http://dx.doi.org/10.1515/ijcre-2012-0014.

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Abstract The relation between the amount of incident photons, absorbed photons, oxidant species, reaction products and electrons in the external circuit should be analyzed individually to determine the step limiting the efficiency of the global photoelectrocatalytic processes. This work discusses the evaluation of three different titania electrodes for the oxidation of methanol in a photoelectrocatalytic reactor. The electrode prepared with three titania coating cycles shows a high efficiency in terms of photochemical (photons to product molecules), electrochemical (product molecules to electrons) and photoelectrochemical (photons to electrons) what explain its high activity for the photoelectrocatalytic oxidation of methanol.

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Cheng, Kai Yuan, Kuo Shan Yao, Hsueh Hsia Lo, Chen Yu Chang, and Po Hsiang Chen. "Photoelectrocatalytic Degradation of Isopropyl Alcohol by TiO₂/Ti Thin-Film Electrode." Advanced Materials Research 123-125 (August 2010): 165–68. http://dx.doi.org/10.4028/www.scientific.net/amr.123-125.165.

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Advanced oxidation processes (AOPs) are potential technologies for the treatment of wastewaters containing non-easily removable organic compounds. Isopropyl alcohol (IPA) is one of the groups with high toxicity and low biodegradability and is always interested by researchers. In this study, Chemical Vapor Deposition (CVD) was used to immobilize TiO2 photocatalyst on the titanium substrate plate and extra applied electric potential on the working electrode (anode) combined with a 365 nm UV lamp for irradiating the IPA wastewater to conduct a photoelectrocatalytic reaction. The experimental results showed, during the photoelectrocatalytic reaction, the extra applied electric potential could inhibit the recombination of the electron-hole pair and raise the overall removal efficiency. However, when the potential was more than 0.5 V, it would reduce the photoelectrocatalytic effect because of the recombination of electrons and holes. Moreover, adding different electrolyte solutions enhanced the different degree of effects of IPA removal. Among the electrolyte solutions added, sodium sulfate improved the photoelectrocatalytic effect most significantly.

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Lunkham, Chirarat, Piyalak Ngernchuklin, and Chatchai Ponchio. "Photoelectrocatalytic and Ultrasonic-Assisted Effects for Organic Dye Degradation Using Zinc Oxide (ZnO) Electrode." Key Engineering Materials 798 (April 2019): 404–11. http://dx.doi.org/10.4028/www.scientific.net/kem.798.404.

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The organic dye is one of the carcinogenic and toxic substrates that are used as the colorant in industries. Therefore, we have to develop the efficient technique to remove the dye in wastewater. This research aimed to develop the photoelectrocatalytic (PEC) cell with the high efficiency, which offered a simple method to remove dye from the wastewater. The ZnO photoanode electrode was considered for developing to enhance the efficiency of PEC cell for dye degradation. The ZnO electrode was fabricated by cyclic voltammetry method and then was compared the oxidation efficiency to ZnO electrode from dip coating. The film thickness of ZnO was controlled by the number of scan for a cyclic voltammetric method and the deposition time for the dip coating method. The effects of scan rate, the number of scan and calcination temperature were optimized to obtain the highest oxidation efficiency. Absorption properties, photoelectrocatalytic activity and electrochemical impedance spectroscopy (EIS) were measured to confirm the characteristic of the two fabricated electrodes. The results showed that ZnO electrode fabricated by cyclic voltammetry presented higher photoelectrocatalytic activity for water oxidation than that from dip coating. Thus, in this research was development ZnO electrode by cyclic voltammetry to degrade organic dye using the photoelectrocatalytic technique. The efficiency of dye degradation was evaluated by the decreasing absorption of methylene blue dye (5 mg/L) as a function of time. It was found that the photoelectrocatalytic dye degradation efficiency with ultrasonic-assisted was enhanced up to two times with 71% degradation in 1 hour. Therefore, we concluded that the developed ZnO electrode by cyclic voltammetry demonstrated a high photoelectrocatalytic performance with ultrasonic-assisted degradation of organic dyes.

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Torralba, Encarnación, and Stéphane Bastide. "Synthesis and Applications of Bimetallic-Derived Catalysts on Semiconductor Materials for Photoelectrocatalytic Processes." Processes 11, no. 2 (February 16, 2023): 609. http://dx.doi.org/10.3390/pr11020609.

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Wahyuningsih, Sayekti, Puji Estiningsih, Velina Anjani, Liya N. M. Z. Saputri, Candra Purnawan, and Edi Pramono. "Enhancing Remazol Yellow FG Decolorination by Adsorption and Photoelectrocatalytic Degradation." Molekul 12, no. 2 (November 30, 2017): 126. http://dx.doi.org/10.20884/1.jm.2017.12.2.321.

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The combination of adsorption and photoelectrocatalytic degradation system for Remazol Yellow FG decolorization has been studied. The adsorption of Remazol Yellow FG was carried out using alumina and silica, which was activated using H2SO4 1 M and NaOH 1 M. The adsorption results at optimum pH were then used for photoelectrocatalytic process. Photoelectrocatalytic degradation cell was built by electrode Ti/TiO2 as a cathode and Ti/TiO2-PbO as an anode. Material characterizations were performed by UV-Vis Spectrophotometers, X-Ray Diffraction (XRD), and Fourier Transform Infra-Red (FTIR). Activation of the adsorbent can increase Remazol Yellow FG adsorption on alumina base and silica acid that were reached 99.500% and 81.631%, respectively. The optimum condition of Remazol Yellow FG 6 adsorption by alumina acid was at pH 3, alumina base were at pH 4 and pH 5, and silica base were at pH 6 and pH 10. Degradation of Remazol Yellow FG using TiO2-PbO electrode was 72.756% at potential cells of 7.5 Volts for 10 minutes. The combination of adsorption and photoelectrocatalytic degradation can decrease the concentration of Remazol Yellow FG achieved 99.705%

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Qiu, Weixin, and Yang Liu. "Stannous Tungstate Semiconductor for Photocatalytic Degradation and Photoelectrochemical Water Splitting: A Review." Energies 15, no. 23 (December 4, 2022): 9194. http://dx.doi.org/10.3390/en15239194.

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The use of photocatalysis and photoelectrocatalysis is expected to achieve the efficient utilization of solar energy to alleviate and even solve the problems of energy depletion and environmental pfollution. At present, stannous tungstate materials have attracted extensive attention in the fields of photocatalysis and photoelectrocatalysis as favorable candidates for such utilization because of their narrow band gap energy (which is ~1.7 eV for the α phase and ~2.7 eV for the β phase, respectively) and unique band structure (which covers the oxidation and reduction potential of water). However, their practical application is still limited by excessive electron–hole recombination and poor stability. In this review, basic information (crystal and electronic structures) related to photocatalysis and photoelectrocatalysis is presented. Additionally, various strategies to enhance the photocatalytic and photoelectrochemical properties of stannous tungstate materials, such as morphological modification, crystal facet engineering, doping modification, and multicomponent compositing, are summarized. Furthermore, the achievements and difficulties of the relevant studies are discussed. The information presented in this review can provide a reference for subsequent research on the photocatalytic and photoelectrochemical performance of tungstate-based materials.

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Kong, Calton J., Emily L. Warren, Ann L. Greenaway, Rajiv Ramanujam Prabhakar, Adele C. Tamboli, and Joel W. Ager. "Design principles of tandem cascade photoelectrochemical devices." Sustainable Energy & Fuels 5, no. 24 (2021): 6361–71. http://dx.doi.org/10.1039/d1se01322j.

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Zhao, Yu, Wen-Han Du, Lei Chen, Jin Xiao, Chao Xiong, and Hong-Chun Yuan. "Photoelectrocatalytic degradation of Rhodamine B using graphene and titanium dioxide composite catalyst." International Journal of Modern Physics B 31, no. 16-19 (July 26, 2017): 1744098. http://dx.doi.org/10.1142/s0217979217440982.

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Graphene and titanium dioxide (TiO2) composite catalyst has been synthesized by hydrothermal synthesis method, and used for the degradation of Rhodamine B (Rh.B) in water. The photoelectrocatalytic activity of this composite was evaluated by decomposing of Rh.B in water under visible or UV light irradiation. The degradation results indicated that the photoelectrocatalytic performance of this composite catalyst was greatly enhanced due to the improved adsorption performance and separation efficiency of photo-generated carriers possibly. The composite with graphene content of 10 wt.% exhibited superior activity under UV light irradiation. After 30 min of reaction, the photoelectrocatalytic degradation ratio of Rh.B was about 96% when pH [Formula: see text] 6–7. The results of this work provide a good method for the treatment of organic wastewater with high performance.

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Kusmierek, Elzbieta. "Semiconductor Electrode Materials Applied in Photoelectrocatalytic Wastewater Treatment—an Overview." Catalysts 10, no. 4 (April 18, 2020): 439. http://dx.doi.org/10.3390/catal10040439.

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Industrial sources of environmental pollution generate huge amounts of industrial wastewater containing various recalcitrant organic and inorganic pollutants that are hazardous to the environment. On the other hand, industrial wastewater can be regarded as a prospective source of fresh water, energy, and valuable raw materials. Conventional sewage treatment systems are often not efficient enough for the complete degradation of pollutants and they are characterized by high energy consumption. Moreover, the chemical energy that is stored in the wastewater is wasted. A solution to these problems is an application of photoelectrocatalytic treatment methods, especially when they are coupled with energy generation. The paper presents a general overview of the semiconductor materials applied as photoelectrodes in the treatment of various pollutants. The fundamentals of photoelectrocatalytic reactions and the mechanism of pollutants treatment as well as parameters affecting the treatment process are presented. Examples of different semiconductor photoelectrodes that are applied in treatment processes are described in order to present the strengths and weaknesses of the photoelectrocatalytic treatment of industrial wastewater. This overview is an addition to the existing knowledge with a particular focus on the main experimental conditions employed in the photoelectrocatalytic degradation of various pollutants with the application of semiconductor photoelectrodes.

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Huang, Weicheng, Jinxin Wang, Lang Bian, Chaoyue Zhao, Danqing Liu, Chongshen Guo, Bin Yang, and Wenwu Cao. "Oxygen vacancy induces self-doping effect and metalloid LSPR in non-stoichiometric tungsten suboxide synergistically contributing to the enhanced photoelectrocatalytic performance of WO3−x/TiO2−x heterojunction." Physical Chemistry Chemical Physics 20, no. 25 (2018): 17268–78. http://dx.doi.org/10.1039/c8cp02044b.

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Argote-Fuentes, Sara, Rossy Feria-Reyes, Esthela Ramos-Ramírez, Norma Gutiérrez-Ortega, and Gustavo Cruz-Jiménez. "Photoelectrocatalytic Degradation of Congo Red Dye with Activated Hydrotalcites and Copper Anode." Catalysts 11, no. 2 (February 5, 2021): 211. http://dx.doi.org/10.3390/catal11020211.

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Photoelectrocatalysis is a novel technique that combines heterogeneous photocatalysis with the application of an electric field to the system through electrodes for the degradation of organic contaminants in aqueous systems, mainly of toxic dyes. The efficiency of these combined processes depends on the semiconductor properties of the catalysts, as well as on the anodic capacity of the electrode. In this study, we propose the use of active hydrotalcites in the degradation of Congo red dye through processes assisted by ultraviolet (UV) irradiation and electric current. Our research focused on evaluating the degradation capacity of Congo red by means of photolysis, catalysis, photocatalysis, electrocatalysis, and photoelectrocatalysis, as well as identifying the effect of the properties of the active hydrotalcites in these processes. The results show that a maximum degradation was reached with the photoelectrocatalysis process with active hydrotalcites and a copper anode at 6 h with 95% in a half-life of 0.36 h. The degradation is favored by the attack of the OH• radicals under double bonds in the diazo groups where the electrode produces Cu2+ ions, and with the photogenerated electrons, the recombination speed of the electron–hole in the hydrotalcite catalyst is reduced until the complete degradation.

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Cheng, Zhi-Lin, and Shuai Han. "Preparation and photoelectrocatalytic performance of N-doped TiO2/NaY zeolite membrane composite electrode material." Water Science and Technology 73, no. 3 (October 7, 2015): 486–92. http://dx.doi.org/10.2166/wst.2015.505.

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A novel composite electrode material based on a N-doped TiO2-loaded NaY zeolite membrane (N-doped TiO2/NaY zeolite membrane) for photoelectrocatalysis was presented. X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–visible (UV-vis) and X-ray photoelectron spectroscopy (XPS) characterization techniques were used to analyze the structure of the N-doped TiO2/NaY zeolite membrane. The XRD and SEM results verified that the N-doped TiO2 nanoparticles with the size of ca. 20 nm have been successfully loaded on the porous stainless steel-supported NaY zeolite membrane. The UV-vis result showed that the N-doped TiO2/NaY zeolite membrane exhibited a more obvious red-shift than that of N-TiO2 nanoparticles. The XPS characterization revealed that the doping of N element into TiO2 was successfully achieved. The photoelectrocatalysis performance of the N-doped TiO2/NaY zeolite membrane composite electrode material was evaluated by phenol removal and also the effects of reaction conditions on the catalytic performance were investigated. Owing to exhibiting an excellent catalytic activity and good recycling stability, the N-doped TiO2/NaY zeolite membrane composite electrode material was of promising application for photoelectrocatalysis in wastewater treatment.

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Yang, Xin Sheng, and Hern Kim. "Photocatalytic Hydrogen Generation of CuO and WO₃ Co-Loaded TiO₂Nanotubes." Applied Mechanics and Materials 110-116 (October 2011): 3781–85. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.3781.

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TiO2 nanotube was prepared by anodization method. CuO and WO3 were loaded by wet impregnation method. The microstructure, phase characteristic and photoelectrocatalytic hydrogen generation performance were studied. The annealed samples were soaked in a mixture solution containing tungstic acid and Cu (NO3)2 and then post-annealed to fabricate Cu-loaded TiO2 nanotube. The obtained samples were characterized by SEM, EDX, XRD and the photoelectrocatalytic hydrogen generation under UV illumination was measured and compared.

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Zhao, Guixia, Xiubing Huang, Xiangxue Wang, and Xiangke Wang. "Progress in catalyst exploration for heterogeneous CO2reduction and utilization: a critical review." J. Mater. Chem. A 5, no. 41 (2017): 21625–49. http://dx.doi.org/10.1039/c7ta07290b.

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Zhong, Shuxian, Yamin Xi, Shijie Wu, Qian Liu, Leihong Zhao, and Song Bai. "Hybrid cocatalysts in semiconductor-based photocatalysis and photoelectrocatalysis." Journal of Materials Chemistry A 8, no. 30 (2020): 14863–94. http://dx.doi.org/10.1039/d0ta04977h.

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The functions, architectures, component cooperation mechanisms, and applications of hybrid cocatalysts in advancing semiconductor-based photocatalysis and photoelectrocatalysis are systematically reviewed.

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Zos'ko, Nikolay A. "Synthesis and Photoelectrocatalytic Activity of Anodic Nanostructured TiO₂ Films." Journal of Siberian Federal University. Chemistry 14, no. 3 (September 2021): 396–405. http://dx.doi.org/10.17516/1998-2836-0249.

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Abstract:

Nanostructured titanium dioxide films were prepared by electrochemical oxidation technique, anodization voltage effect on structure morphology, optical and photoelectrocatalytic performances of the nanotubes were studied. The anodization voltage is shown to significantly affect structure of nanofilms and, accordingly, their photoelectrocatalytic activity. An active heterojunction photoanode was synthesised with electrodeposition of Cu₂O onanodized TiO₂. The anode photoelectroact ivityunder bias 1V (Ag/AgCl/3,5M KCl) is found to be 15 % higher than that of the original nanostructured TiO₂ film

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50

Newhouse, P. F., D. A. Boyd, A. Shinde, D. Guevarra, L. Zhou, E. Soedarmadji, G. Li, J. B. Neaton, and J. M. Gregoire. "Solar fuel photoanodes prepared by inkjet printing of copper vanadates." Journal of Materials Chemistry A 4, no. 19 (2016): 7483–94. http://dx.doi.org/10.1039/c6ta01252c.

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Journal articles on the topic 'Photoelectrocatalysi'

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