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Journal articles on the topic 'Photocalyse'

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Author: Grafiati

Published: 4 May 2024

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1

Cassano, A. E. "Photoelectronics, Photocalysis and Photoreactors." Chemical Engineering Science 41, no. 12 (1986): 3237–38. http://dx.doi.org/10.1016/0009-2509(86)85069-2.

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2

Dadheech, Monika, and B. V. Kabra. "Treatment of Industrial wastewater containing dye Sulphur Black 1 in presence of semiconductor Strontium Chromate." Ecology, Environment and Conservation 28, no. 04 (2022): 2136–39. http://dx.doi.org/10.53550/eec.2022.v28i04.075.

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The paper reports a work done on photocatalytic degradation of an Industrial dye Sulphur Black 1 with the help of Strontium Chromate photocatalyst. The experiment was controlled by photocalayst, visible light and air. And also studied the effect of hydrogen ion concentration, dye concentration and quantity of catalyst on the photodegradation. The experiment observed by spectrophotometrically at definite time gape

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3

Selloni, Annabella. "(Invited) Photocatalysis on TiO₂: Insights from Simulations." ECS Meeting Abstracts MA2018-01, no. 31 (April 13, 2018): 1861. http://dx.doi.org/10.1149/ma2018-01/31/1861.

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We discuss recent applications of first principles electronic structure calculations and molecular dynamics simulations to understand materials properties and reaction mechanisms in TiO2-based photocalysis. We focus on the structure of the TiO2-water interface, the behavior of photoexcited electrons at this interface, and the formation and structure of so-called black TiO2, a promising functional material capable to absorb the whole spectrum of visible light.

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4

Barba-Molina, Heli, J. Barba-Ortega, and M. R. Joya. "Presence of nitrateNO3a ects animal production, photocalysis is a possible solution." Journal of Physics: Conference Series 687 (February 2016): 012019. http://dx.doi.org/10.1088/1742-6596/687/1/012019.

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5

Peng, Yu, Shuai Kang, and Zhuofeng Hu. "Pt Nanoparticle-Decorated CdS Photocalysts for CO2 Reduction and H2 Evolution." ACS Applied Nano Materials 3, no. 9 (August 11, 2020): 8632–39. http://dx.doi.org/10.1021/acsanm.0c01300.

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6

Krut’ko, E. N., T. N. Galkova, and A. I. Kulak. "Composite photocalysts based on the nanostructural titanium dioxide and zirconium phosphate." Russian Journal of Physical Chemistry A 82, no. 13 (November 26, 2008): 2219–22. http://dx.doi.org/10.1134/s0036024408130104.

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7

Fernández-Catalá, J., G. Garrigós-Pastor, Á. Berenguer-Murcia, and D. Cazorla-Amorós. "Photo-microfluidic chip reactors for propene complete oxidation with TiO2 photocalyst using UV-LED light." Journal of Environmental Chemical Engineering 7, no. 5 (October 2019): 103408. http://dx.doi.org/10.1016/j.jece.2019.103408.

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8

Grabis, Jānis, Anita Letlena, and Inta Sīpola. "Preparation and Properties of Photocalysts in ZnO/TiO₂ System." Key Engineering Materials 800 (April 2019): 170–74. http://dx.doi.org/10.4028/www.scientific.net/kem.800.170.

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ZnO/TiO2 nanocomposites with several ratio of the components were prepared by sol-gel method using titanium isopropoxide and titanium butoxide as titania precursors. Phase formation and photocatalytic activity of ZnO/TiO2 nanocomposites depend on ratio of the components and calcination temperature. The photocatalytic activity in dependence on calcination temperasture, phase composition was determined by degradation of methylene blue solution under Hg lamp and solar light imitating illumination. The highest photocatalytic activity showed ZnO/TiO2 nanocomposites containing 99 mol.% ZnO and 50 mol% ZnO when hexagonal ZnTiO3 phase was formed. ZnO/TiO2 nanocomposites exhibited enhanced photoactivity under solar light with respect to Hg lamp irradiation.

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9

Zheng, Ying, and Lin Xia Gao. "Study on Fiber Optical Reactor Catalytic Degradation of Oxytetracycline." Applied Mechanics and Materials 361-363 (August 2013): 1020–23. http://dx.doi.org/10.4028/www.scientific.net/amm.361-363.1020.

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Antibiotics have played a positive role in human health and. But underutilized antibiotics can’t be removed by normal treatment. The paper study the impact of fiber optical reactor catalytic degradation of oxytetracycline and step to examine the degradation effect. The results show that: temperature increases within a certain range contribute to the degradation of the oxytetracycline. Effects of pH on the photocatalytic reaction were significant, and alkaline conditions is more conducive to oxytetracycline photocatalytic degradation. In the concentration range of the experimental study, oxytetracycline photocatalytic degradation was inhibited by the higher initial concentration. Catalyst promoted oxytetracycline degradation, its addition amount on photocatalytic reaction influence is relatively large, when the pH is 7, with the increase of nano-TiO2 dosage, removal rate was gradually increased. The degradation rate of oxytetracycline in different reaction process can be shown as: photocalysis＞photolysis＞hydrolysis in this research.

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10

Ma, Dongling. "(Invited) Towards Broadband Photocatalysis." ECS Meeting Abstracts MA2023-02, no. 47 (December 22, 2023): 2372. http://dx.doi.org/10.1149/ma2023-02472372mtgabs.

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Forming nanomaterials junctions and using plasmons represent two important, promising strategies for realizing broadband photocalysis in strategically important applications such as solar fuels and photocatalytic degradation of pollutants. In this talk, I will present some of our recent work on the rational design of nanohybrids and their applications in solar fuels and photocatalysis. One example is about the in situ synthesis of plasmonic Ag nanoparticles (AgNPs) and Ag-MOF. The intimate and stable interface between the AgNPs and Ag-MOF and hot electron transfer from the plasmonic AgNPs to MOF led to highly efficient visible-light photocatalytic H2 generation in aqueous solution, which surpasses most of reported MOF-based photocatalytic systems. This work sheds light on effective electronic and energy bridging between plasmonic NPs and MOF. References: [1] Nature communications, 12: 1231 (2021); [2] Nature communications, 2023, in press; [3] Chemistry of Materials, 2021, 33, 695-705; [4] Adv. Funct. Mater. 2019, 1902486.

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11

Seiß, Volker, Susanne Thiel, and Maik Eichelbaum. "Preparation and Real World Applications of Titania Composite Materials for Photocatalytic Surface, Air, and Water Purification: State of the Art." Inorganics 10, no. 9 (September 15, 2022): 139. http://dx.doi.org/10.3390/inorganics10090139.

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The semiconducting transition metal oxide TiO2 is a rather cheap and non-toxic material with superior photocatalytic properties. TiO2 thin films and nanoparticles are known to have antibacterial, antiviral, antifungal, antialgal, self, water, and air-cleaning properties under UV or sun light irradiation. Based on these excellent qualities, titania holds great promises in various fields of applications. The vast majority of published field and pilot scale studies are dealing with the modification of building materials or generally focus on air purification. Based on the reviewed papers, for the coating of glass, walls, ceilings, streets, tunnels, and other large surfaces, titania is usually applied by spray-coating due to the scalibility and cost-efficiency of this method compared to alternative coating procedures. In contrast, commercialized applications of titania in medical fields or in water purification are rarely found. Moreover, in many realistic test scenarios it becomes evident that the photocatalytic activity is often significantly lower than in laboratory settings. In this review, we will give an overview on the most relevant real world applications and commonly applied preparation methods for these purposes. We will also look at the relevant bottlenecks such as visible light photocatalytic activity and long-term stability and will make suggestions to overcome these hurdles for a widespread usage of titania as photocalyst.

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12

Santoso, Uripto Trisno, Herdiansyah Herdiansyah, Sri Juari Santosa, and Dwi Siswanta. "REDUCTION AND OXIDATION PROCESSES OF CHROMIUM IN HUMIC ACID SUBFRACTION-SENSITIZED PHOTOCATALYST." Indonesian Journal of Chemistry 4, no. 3 (June 10, 2010): 168–73. http://dx.doi.org/10.22146/ijc.21848.

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The process of reduction and oxidation of soluble chromium in humic acid subfraction-sensitized photocatalyst was studied. Humic acid was extracted from peat soil sampled in Gambut District, South Kalimantan. Humic acid (HA) was fractionated to humic acid subfraction (HAS) by centrifugation method. ZnO and TiO2 were applied as the photocatalysts produced by Merck, suspended in solution of 2 g/L. Two germicide UV lamps 30 watt (Philip®) was placed in a box at 20 cm above the samples. The results showed that HA or HAS sensitized the photoreduction of Cr(VI) by photocatalyst. The low molecular weight of HAS is more effective to act as sensitizer than the high molecular weight one. The yield of the photoreduction of Cr(VI) with photocatalysts enhanced both in the presence of Fe(II) ion and HAS. UV irradiation of the MnO4- solutions containing Cr(III) induced the photooxidation of Cr(III) to Cr(VI). The presence of Fe(III) or HAS doesn't inhibit significantly. The inhibition is enhanced by the present of both HAS and Fe(II) or HAS and Fe(III). This inhibition is enhanced more by the presence of ZnO or TiO2 photocalysts. Keywords: reduction, oxidation, chromium, humic acid, photocatalyst

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13

Begum, Shamima, and Md Ahmaruzzaman. "Green Synthesis of SnO 2 Nanoparticles loaded on Activated Carbon and its Application as Photocalayst in the Degradation of Alizarin Red S Dye." Materials Today: Proceedings 5, no. 1 (2018): 2314–20. http://dx.doi.org/10.1016/j.matpr.2017.09.235.

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14

Ma, Dongling. "(Invited) Towards Broadband Solar Fuel Production." ECS Meeting Abstracts MA2022-02, no. 48 (October 9, 2022): 1804. http://dx.doi.org/10.1149/ma2022-02481804mtgabs.

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Combining nanomaterials of different properties into nanohybrids can potentially lead to improved properties/performance or multiple functions. In particular, forming nanomaterials junctions and using plasmons represent two important, promising strategies for realizing broadband photocalysis in strategically important applications such as solar fuels and photocatalytic degradation of pollutants in our environments. In this talk, I will present some of our recent work on the rational design and realization of nanohybrid materials as well as their applications in solar fuel and photocatalysis. For instance, the construction of homojunctions of nanoplates made of metal–organic frameworks (MOF) led to broadened light absorption and increased photoactivity. The well-defined MOF homojunction was prepared by a facile one-pot synthesis route directed by hollow transition metal nanoparticles. The homojunction is enabled by two concentric stacked nanoplates with slightly different crystal phases. The enhanced charge separation in the homojunction was visualized by in-situ surface photovoltage microscopy. The as-prepared nanostacks displayed a visible-light-driven carbon dioxide reduction with very high carbon monooxide selectivity, and excellent stability. Another example is about the in situ synthesis of plasmonic Ag nanoparticles (AgNPs) and Ag-MOM (metal organic matrix) using one-step facile approach. The intimate and stable interface between the AgNPs and Ag-MOM and hot electron transfer from the plasmonic AgNPs to MOM led to highly efficient visible-light photocatalytic H2 generation in aqueous solution, which surpasses most of reported MOF-based photocatalytic systems. This work sheds light on effective electronic and energy bridging between plasmonic NPs and metal organic matrix. Related References: [1] Nature communications, 12, Article number: 1231 (2021); [2] Nature communications, 2022, under revision; [3] Chemistry of Materials, 2021, 33, 695-705; [4] Adv. Funct. Mater. 2019, 1902486.

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15

Vigarani, Giulia, Edoardo Marchini, Eleonora Previati, Loris Giorgini, Stefano Zacchini, Roberto Argazzi, Massimiliano Massi, Valentina Fiorini, Stefano Caramori, and Stefano Stagni. "Designing Ionic Ir(III) Cyclometalated Complexes as Photocatalysts for Light Assisted ATRP of MMA. A Combined Experimental and Mechanistic Study." Chemistry – A European Journal, March 5, 2024. http://dx.doi.org/10.1002/chem.202400393.

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A new family of ionic Ir(III) cyclometalated complexes with general formula [Ir(C^N)2(N^N)][Br], was designed and prepared to be assessed as photocalysts for the visible light assisted ATRP polymerization of MMA. To this purpose, our design strategy involved both: i) the decoration of the cyclometalating (C^N) and the ancillary (N^N) ligands with various electron withdrawing and/or electron donor substituents and, ii) the use of Br‐ as the counter anion for these cationic Ir(III) species. After an extensive screening in which the [Ir(C^N)2(N^N)][Br]‐type compounds were compared to the model neutral complex fac‐[Ir(ppy)3], the “fully” amino‐substituted ion pairs abbreviated as [10][Br] and [11][Br], exhibited the best photocatalytic performances under irradiation with CFL lamps. It is worth noting that the outcomes of transient absorption spectroscopy (TAS) experiments combined with theoretical DFT calculations, allowed to corroborate the role played by the Ir(III) complexes in the mechanism responsible the photoATRP process, and suggested the rationalization of the different performances that were highlighted by our Ir(III) catalyst in the visible light assisted photopolymerization of MMA.

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16

Belaidi, S., L. Mammeri, H. Mechakra, W. Remache, K. Benhamouda, S. Larouk, M. A. Kribeche, and T. Sehili. "UV and Solar Light Induced Natural Iron Oxide Activation: Characterization and Photocatalytic Degradation of Organic Compounds." International Journal of Chemical Reactor Engineering 17, no. 1 (September 5, 2018). http://dx.doi.org/10.1515/ijcre-2018-0027.

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Abstract In this study we demonstrate the efficiency of a natural mineral as a photocalyst. This natural mineral was provided from the iron ore deposit from Chaabet-El-Ballout which is located in North-East of Algeria. The characterization analysis of the mineral by the Energy-dispersive X-ray spectroscopy (EDX) revealed that the natural powder has a mixed elemental composition and consist mainly of iron oxide with 50 % of iron. In order to determine the crystal phase composition of the natural iron oxide (NIO), X-ray diffraction (DRX) measurement and infrared absorption spectroscopy (FTIR) were carried out. The results showed that the NIO has a mixed crystal structure composed mainly of hematite and lesser extent of goethite. The specific surface area and the total pore volume of the NIO were 79.015 m2g−1 and 0.0892 cm3g−1 respectively, measured by the Brunauer Emmett–Teller method (BET). The Raman spectrum of the NIO confirmed that the sample has seven characteristic peaks attributable to hematite. The optical properties of soil powder were examined by UV-vis diffuse reflectance spectroscopy (DRS). The pH of point of zero charge (pHpzc) of the adsorbent was determined, a value of 8.3 was found. The photocatalytic activity of the NIO particles was tested by the decomposition of aqueous solution of different class of compounds; phenolic compounds, pesticides and dyes due to their presence in many types of wastewaters. The sorption on the surface of the NIO with photocatalytic oxidation using oxalic acid and hydrogen peroxide would be an effective oxidation process for the removal of contaminants under UV and solar irradiation. High percentages of degradation of 1- Naphtol (1-NP) and Linuron were found about, 94.6 %, 97.2 % respectively, in presence of NIO and H2O2 under UV irradiation. The presence of oxalic acid with NIO enhanced the photodegradation of 2,6-dimethylphenol (2,6-DMP), 2-chlorophenol (2-CP) and Methylene blue (MB) with 72 %, 92 % and 100 % percentages of degradation respectively.

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