Relevant bibliographies by topics / Flexible photocatalysts

Academic literature on the topic 'Flexible photocatalysts'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Flexible photocatalysts"

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Fadlun, Wan. "Carbon Dioxide Reduction to Solar Fuels via Iron-Based Nanocomposite: Strategies to Intensify the Photoactivity." Journal of Computational and Theoretical Nanoscience 17, no. 2 (February 1, 2020): 654–62. http://dx.doi.org/10.1166/jctn.2020.8789.

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Photocatalysis has been studied over three decades ago as a promising alternative for carbon dioxide (CO2) reduction with the ultimate objective of promoting sustainable keys to address global warming and energy crisis. In particular, photocatalysis offers the reduction of CO2 to renewable hydrocarbon fuels by utilizing limitless sunlight to trigger the reaction. The urgency reducing CO2 to solar fuels have aroused attention towards Fe-based material owing to their abundance, flexible compositional tunability, recyclability, and low cost compared to noble-metal photocatalysts. This review discussed comprehensively the recent evolution on Fe-based photocatalysts for CO2 reduction including metallic iron, iron oxide, and ternary iron oxides based photocatalysts. In the mainstream, detailed discussion on the main strategies adopted in the morphology and structure to enhance the photocatalytic performance have been discussed in detail for each type of Fe-based catalysts. The enhancements of Fe-based photocatalyst is analyzed with a view to emphasizing the reaction mechanism and probable pathways for the production of solar fuels. In addition, thermodynamics are discussed critically for selectivity of photocatalytic CO2 reduction. The existing constrains and guidance for future studies were defined, pledging to develop superior Fe-based photocatalysts for CO2 reduction with better-improved power reduction efficiency and generation rates.
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Zhou, Tong-Tong, Feng-He Zhao, Yu-Qian Cui, Li-Xiang Chen, Jia-Shu Yan, Xiao-Xiong Wang, and Yun-Ze Long. "Flexible TiO2/PVDF/g-C3N4 Nanocomposite with Excellent Light Photocatalytic Performance." Polymers 12, no. 1 (December 31, 2019): 55. http://dx.doi.org/10.3390/polym12010055.

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As the world faces water shortage and pollution crises, the development of novel visible light photocatalysts to purify water resources is urgently needed. Over the past decades, most of the reported photocatalysts have been in powder or granular forms, creating separation and recycling difficulties. To overcome these challenges, a flexible and recyclable heterostructured TiO2/polyvinylidene fluoride/graphitic carbon nitride (TiO2/PVDF/g-C3N4) composite was developed by combining electrospinning, sintering and hydrothermal methods. In the composite, PVDF was used as a support template for removing and separating the photocatalyst from solution. Compared with pure TiO2, the TiO2/PVDF/g-C3N4 composite exhibited the extended light capture range of TiO2 into the visible light region. The photogenerated carriers were efficiently transferred and separated at the contact interface between TiO2 and g-C3N4 under visible light irradiation, which consequently increased the photocatalytic activity of the photocatalyst. In addition, the flexible composites exhibited excellent self-cleaning properties, and the dye on the photocatalysts was completely degraded by the as-prepared materials. Based on the intrinsic low cost, recyclability, absorption of visible light, facile synthesis, self-cleaning properties and good photocatalytic performances of the composite, the photocatalyst is expected to be used for water treatment.
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Dutta, Vishal, Ankush Chauhan, Ritesh Verma, C. Gopalkrishnan, and Van-Huy Nguyen. "Recent trends in Bi-based nanomaterials: challenges, fabrication, enhancement techniques, and environmental applications." Beilstein Journal of Nanotechnology 13 (November 11, 2022): 1316–36. http://dx.doi.org/10.3762/bjnano.13.109.

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One of the most enticing approaches to environmental restoration and energy conversion is photocatalysis powered by solar light. Traditional photocatalysts have limited practical uses due to inadequate light absorption, charge separation, and unknown reaction mechanisms. Discovering new visible-light photocatalysts and investigating their modification is crucial in photocatalysis. Bi-based photocatalytic nanomaterials have gotten much interest as they exhibit distinctive geometric shapes, flexible electronic structures, and good photocatalytic performance under visible light. They can be employed as stand-alone photocatalysts for pollution control and energy production, but they do not have optimum efficacy. As a result, their photocatalytic effectiveness has been significantly improved in the recent decades. Numerous newly created concepts and methodologies have brought significant progress in defining the fundamental features of photocatalysts, upgrading the photocatalytic ability, and understanding essential reactions of the photocatalytic process. This paper provides insights into the characteristics of Bi-based photocatalysts, making them a promising future nanomaterial for environmental remediation. The current review discusses the fabrication techniques and enhancement in Bi-based semiconductor photocatalysts. Various environmental applications, such as H2 generation and elimination of water pollutants, are also discussed in terms of semiconductor photocatalysis. Future developments will be guided by the uses, issues, and possibilities of Bi-based photocatalysts.
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Ainali, Nina Maria, Dimitrios Kalaronis, Eleni Evgenidou, Dimitrios N. Bikiaris, and Dimitra A. Lambropoulou. "Insights into Biodegradable Polymer-Supported Titanium Dioxide Photocatalysts for Environmental Remediation." Macromol 1, no. 3 (August 2, 2021): 201–33. http://dx.doi.org/10.3390/macromol1030015.

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During the past two decades, immobilization of titanium dioxide (TiO2), a well-known photocatalyst, on several polymeric substrates has extensively gained ground since it limits the need of post-treatment separation stages. Taking into account the numerous substrates tested for supporting TiO2 photocatalysts, the use of biodegradable polymer seems a hopeful option owing to its considerable merits, including the flexible nature, low price, chemical inertness, mechanical stability and wide feasibility. The present review places its emphasis on recently published research articles (2011–2021) and exhibits the most innovative studies facilitating the eco-friendly biodegradable polymers to fabricate polymer-based photocatalysts, while the preparation details, photocatalytic performance and reuse of the TiO2/polymer photocatalysts is also debated. The biodegradable polymers examined herein comprise of chitosan (CS), cellulose, alginate, starch, poly(lactid acid) (PLA), polycaprolactone (PCL) and poly(lactide-co-glycolide) (PLGA), while an emphasis on the synthetical pathway (dip-coating, electrospinning, etc.) of the photocatalysts is provided.
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Zhang, Bo, Jing Zheng, Lu Wei Ma, Bin Guo, Xiao Chun He, Ming Jun Gao, Lin Bian, Xing Fa Ma, and Guang Li. "Charge Behavior of Low-Dimensional V2O5/Graphene Nanoribbons Oxides Nanocomposites under Irradiation of Visible Light and its Application." Materials Science Forum 847 (March 2016): 203–10. http://dx.doi.org/10.4028/www.scientific.net/msf.847.203.

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Due to its outstanding photo-catalysis properties, low-dimensional V2O5 has many important applications in lithium ion batteries, supercapacitors, electrochromic devices, photocatalysts, sensors, et al. As good photocatalysts for organic pollutants, some key issues of photocatalysts are charge generation, separation, transfer of nanocomposites under irradiation of visible light. To improve their important properties and pave the effective conductive channels for charge transfer and separation, low-dimensional V2O5/graphene nanoribbons nanocomposites were prepared. The emphasis is put on adsorption response to VOC of nanocomposite based on the QCM (quartz crystal microbalance) device. In order to investigate the mechanism of charge-generated by visible light, the photoconductivity response to visible light and 808 nm laser with low-power were studied based on interdigital electrodes of Au on flexible PET (polyethylene terephthalate) film substrate. Some good results were obtained. This illustrates that this nanocomposite can easily produce the charge-generate with visible light and 808 nm laser with low-power, avoiding the recombination of charge-generate by light. It would be good applications in remove the organic pollutants with photocatalysis effects.
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Bockenstedt, Jonathan, Niraj Ashutosh Vidwans, Terry Gentry, and Sreeram Vaddiraju. "Catalyst Recovery, Regeneration and Reuse during Large-Scale Disinfection of Water Using Photocatalysis." Water 13, no. 19 (September 24, 2021): 2623. http://dx.doi.org/10.3390/w13192623.

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The deployment of photocatalysis for remediation of water has not yet been realized, although laboratory-scale studies have demonstrated promise. Accomplishing this requires the development of photocatalysis as a process, including studying its efficiencies in remedying water when high volumes of water are processed, and addressing the recovery, possible regeneration and reuse of the photocatalysts. To that end, this work is aimed at demonstrating the use of a custom-built mobile platform for disinfecting large quantities of water. The benchtop platform built is capable of processing 15.14 L (4 gallons) per minute of water, with possibility for further scale-up. Preliminary studies on the catalyst recovery, regeneration and reuse via gravity-assisted settling, centrifugation and air plasma treatment indicated that 77% of Aeroxide® P25 titania (TiO2) nanoparticle and 57% of porous TiO2 nanowire photocatalysts could be recovered and regenerated for further use. Overall, this study indicated that process improvements, including increasing the kinetics of the photocatalysis, and optimization of the efficacies of the catalyst recovery and regeneration processes will make it useful for water remediation on any scale. More importantly, the portable and flexible nature of the benchtop photocatalysis system makes it amenable for use in conjunction with existing technologies for remedying large quantities of water.
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Han, Liu, Haohao Dong, Dong Mao, Baolv Hua, Qinyu Li, and Dong Fang. "Facile Synthesis of Indium Sulfide/Flexible Electrospun Carbon Nanofiber for Enhanced Photocatalytic Efficiency and Its Application." Scanning 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/6513903.

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Heterojunction system has been proved as one of the best architectures for photocatalyst owing to extending specific surface area, expanding spectral response range, and increasing photoinduced charges generation, separation, and transmission, which can provide better light absorption range and higher reaction site. In this paper, Indium Sulfide/Flexible Electrospun Carbon Nanofiber (In2S3/CNF) heterogeneous systems were synthesized by a facile one-pot hydrothermal method. The results from characterizations of SEM, TEM, XRD, Raman, and UV-visible diffuse reflectance spectroscopy displayed that flower-like In2S3 was deposited on the hair-like CNF template, forming a one-dimensional nanofibrous network heterojunction photocatalyst. And the newly prepared In2S3/CNF photocatalysts exhibit greatly enhanced photocatalytic activity compared to pure In2S3. In addition, the formation mechanism of the one-dimensional heterojunction In2S3/CNF photocatalyst is discussed and a promising approach to degrade Rhodamine B (RB) in the photocatalytic process is processed.
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Li, Yaru, Dongsheng Zhang, Wei Qiao, Hongwei Xiang, Flemming Besenbacher, Yongwang Li, and Ren Su. "Nanostructured heterogeneous photocatalyst materials for green synthesis of valuable chemicals." Chemical Synthesis 2, no. 2 (2022): 9. http://dx.doi.org/10.20517/cs.2022.05.

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The photocatalytic process employing nanostructured semiconductor materials has attracted great attention in energy production, CO2 reduction, and water/air purification for decades. Recently, applying heterogeneous photocatalyst for the synthesis of valuable chemicals is gradually emerging and considered as a promising process for the conversion of cheap resources (i.e., biomass derivatives, polyols, and aromatic hydrocarbons). Compared with traditional thermal catalytic approaches, the photocatalytic process provides a mild reaction condition and flexible platform (photocatalyst) that allows precise tweaking of reaction intermediates and reaction pathways, thus resulting in fine control of the selective synthesis of specialized chemicals that are challenging for thermal catalysis. In this review, we summarize recent achievements in photocatalytic synthesis of various industrial important chemicals via photo-oxidative and photo-reductive processes. The selective oxidation of alcohols and aromatics, epoxidation of alkenes, hydrogenation of gaseous molecules and hydrocarbons, and coupling reactions by means of various photocatalysts including metal oxides, supported plasmonic metal nanostructures, conjugated organic polymers, anchored homogeneous catalysts, and dye-sensitized heterostructures are discussed from a material perspective. In addition, fundamental understandings of reaction mechanisms and rational design of nanostructured photocatalysts for enhancing efficiency, selectivity, and stability are discussed in detail.
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Zhang, Qi, and Zhang. "AgBr/BiOBr Nano-Heterostructure-Decorated Polyacrylonitrile Nanofibers: A Recyclable High-Performance Photocatalyst for Dye Degradation under Visible-Light Irradiation." Polymers 11, no. 10 (October 19, 2019): 1718. http://dx.doi.org/10.3390/polym11101718.

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Macrostructural flexible photocatalysts have been proven to have desirable recyclable properties during the photocatalytic degradation of organic pollutants in water. However, the photocatalytic activities of these photocatalysts are often unsatisfactory due to the fast recombination of charge carriers and the limited surface active sites. Herein, we developed a novel flexible photocatalyst of AgBr/BiOBr/polyacrylonitrile (PAN) composite mats (CMs) through the controllable assembly of AgBr/BiOBr nano-heterostructures on electrospun polyacrylonitrile nanofibers (PAN NFs) via a three-step synthesis route. The component ratio of AgBr to BiOBr in the CMs could be easily adjusted by controlling the in situ ion exchange process. The charge–transfer process occurring at the interface of the AgBr/BiOBr nano-heterostructures strongly hindered the recombination of photoinduced electron–hole pairs, thereby effectively enhancing the photocatalytic activity of the AgBr/BiOBr/PAN CMs. Meanwhile, the unique hierarchical inorganic/organic heterostructure of the AgBr/BiOBr/PAN CMs not only led to good flexibility, but also provided an abundance of active sites for photocatalytic reactions. Upon visible-light irradiation, AgBr/BiOBr/PAN CMs with an optimal ratio of AgBr to BiOBr components exhibited both enhanced photocatalytic activity and excellent separability during the degradation of methyl orange in water compared to the BiOBr/PAN CMs.
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Dai, Baoying, Hengming Huang, Wei Wang, Yukai Chen, Chunhua Lu, Jiahui Kou, Lianzhou Wang, Fulei Wang, and Zhongzi Xu. "Greatly enhanced photocatalytic activity by organic flexible piezoelectric PVDF induced spatial electric field." Catalysis Science & Technology 7, no. 23 (2017): 5594–601. http://dx.doi.org/10.1039/c7cy01638g.

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Dissertations / Theses on the topic "Flexible photocatalysts"

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Tomarchio, Flavia. "Nanomaterials-based inks for flexible electronics, energy and photocatalytic applications." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/275888.

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Due to the combination of their electronic, optical and mechanical properties, graphene and other layered materials (GRMs) have great potential for applications such as flexible optoelectronics and energy storage. Given that GRMs can be dispersed in solvents, solution processing is a particularly interesting approach that allows large volume production with tailored properties according to the targeted applications. \par In this dissertation I investigate liquid phase exfoliation and formulation of GRMs-based inks for flexible (opto) electronics, energy and photocatalysis. First I develop a protocol for the characterization of graphene inks, based on the statistical analysis of their Raman spectra. Such a tool is essential because of the scattering of characteristics in liquid-phase exfoliated material. I then report two novel processing techniques. The first consists on the exfoliation of graphene in organic solvents by the means of $\alpha$-functionalized alkanes as stabilising agents, which allows yield by weight ($Y_W$) of $\sim 100\%$. The second is based on exfoliation of graphite by microfluidization, where the material is stabilised in aqueous solution, with concentrations up to 100g/L. Such inks are successfully deposited by blade coating, leading to films of conductivity $\sim$ 2$\cdot$10$^4$ S/m at 25$\mu$m. I then investigate the use of graphene inks in optoelectronics and energy applications: First, I investigate inkjet printed graphene as hole injection layer (HTL). The cells with graphene HTL show high long-term stability, retaining 85$\%$ of the initial fill factor after 900 hrs in damp heat conditions. I then demonstrate flexible displays with graphene-SWNTs as pixel electrode. A 4x4 inch$^2$ demonstrator is realised integrating the ink into 12,700 pixels. I investigate graphene/MoO$_3$ electrode for supercapacitors with a specific capacitance of 342 F/cm$^3$. The electrode shows high cyclic stability, preserving $\sim$96$\%$ of the initial capacitance after 10,000 cycles. I finally report the production of TiO$_2$/exfoliated graphite as efficient photocatalytic composite able to degrade $\sim$100$\%$ more model pollutant with respect to TiO$_2$.
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Yeh, Shang-Ming, and 葉上銘. "Large Area Hydrothermally Grown Silver/Copper Oxide/Zinc Oxide Nanowire Composite on Flexible Substrate and Applications in Photocatalysis and Gas Adsorption." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/9b4z28.

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Book chapters on the topic "Flexible photocatalysts"

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Isabel Bento Rovisco, Ana, Rita Branquinho, Joana Vaz Pinto, Rodrigo Martins, Elvira Fortunato, and Pedro Barquinha. "Hydrothermal Synthesis of Zinc Tin Oxide Nanostructures for Photocatalysis, Energy Harvesting and Electronics." In Novel Nanomaterials [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94294.

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The massification of Internet of Things (IoT) and Smart Surfaces has increased the demand for nanomaterials excelling at specific properties required for their target application, but also offering multifunctionality, conformal integration in multiple surfaces and sustainability, in line with the European Green Deal goals. Metal oxides have been key materials for this end, finding applications from flexible electronics to photocatalysis and energy harvesting, with multicomponent materials as zinc tin oxide (ZTO) emerging as some of the most promising possibilities. This chapter is dedicated to the hydrothermal synthesis of ZTO nanostructures, expanding the already wide potential of ZnO. A literature review on the latest progress on the synthesis of a multitude of ZTO nanostructures is provided (e.g., nanowires, nanoparticles, nanosheets), emphasizing the relevance of advanced nanoscale techniques for proper characterization of such materials. The multifunctionality of ZTO will also be covered, with special attention being given to their potential for photocatalysis, electronic devices and energy harvesters.
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Conference papers on the topic "Flexible photocatalysts"

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Li, Jing, Zhen Su, Dandan Zhang, and Heping Li. "Free-standing and flexible heterojunction net as highly efficient and easily recycled photocatalyst." In Photonics for Energy. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/pfe.2018.pt4b.3.

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Yulianti, Riyani T., Yuyun Irmawati, Fredina Destyorini, Nurfina Yudasari, Anung Syampurwadi, Didik Aryanto, Isnaeni, and Rike Yudianti. "UV photoactivity of a flexible ZnO hybrid photocatalyst grown on a conductive cellulose-based substrate." In THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIAL AND TECHNOLOGY (ICAMT) 2021. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0129725.

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