Constructing ZnO/ZnCr2O4@TiO2-NTA Nanocomposite for Photovoltaic Conversion and Photocatalytic Hydrogen Evolution

Zhang, Li; Huang, Yang; Dai, Chaohua; Liang, Qingman; Yang, Peng; Yang, Haihua; Yan, Jun

doi:10.1007/s11664-019-06927-y

Cited by 9 publications

(5 citation statements)

References 39 publications

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“…624.9 µmol/h/ [55] ZnO/ZnCr2O4@TiO2-NTA Photocatalyst dispersed in aqueous methanol solution under simulated solar light. 1680 µmol/cm 2 [152] F-TiO2/CdSe-DETA Photocatalyst was dispersed in a mixed solution of Na2S and Na2SO3 as a sacrificial agents under visible light with the use of Pt as a cocatalyst.…”

Section: Photocatalyst Reaction Conditions Her Referencementioning

confidence: 99%

Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

et al. 2020

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Clean water and the increased use of renewable energy are considered to be two of the main goals in the effort to achieve a sustainable living environment. The fulfillment of these goals may include the use of solar-driven photocatalytic processes that are found to be quite effective in water purification, as well as hydrogen generation. H2 production by water splitting and photocatalytic degradation of organic pollutants in water both rely on the formation of electron/hole (e−/h+) pairs at a semiconducting material upon its excitation by light with sufficient photon energy. Most of the photocatalytic studies involve the use of TiO2 and well-suited model compounds, either as sacrificial agents or pollutants. However, the wider application of this technology requires the harvesting of a broader spectrum of solar irradiation and the suppression of the recombination of photogenerated charge carriers. These limitations can be overcome by the use of different strategies, among which the focus is put on the creation of heterojunctions with another narrow bandgap semiconductor, which can provide high response in the visible light region. In this review paper, we report the most recent advances in the application of TiO2 based heterojunction (semiconductor-semiconductor) composites for photocatalytic water treatment and water splitting. This review article is subdivided into two major parts, namely Photocatalytic water treatment and Photocatalytic water splitting, to give a thorough examination of all achieved progress. The first part provides an overview on photocatalytic degradation mechanism principles, followed by the most recent applications for photocatalytic degradation and mineralization of contaminants of emerging concern (CEC), such as pharmaceuticals and pesticides with a critical insight into removal mechanism, while the second part focuses on fabrication of TiO2-based heterojunctions with carbon-based materials, transition metal oxides, transition metal chalcogenides, and multiple composites that were made of three or more semiconductor materials for photocatalytic water splitting.

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Section: Photocatalyst Reaction Conditions Her Referencementioning

confidence: 99%

Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

et al. 2020

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“…Comprehensive investigations into ZnO as a semiconductor photoanode for sunlightdriven water decomposition have highlighted both its potential and limitations. The primary drawbacks of ZnO encompass the rapid recombination of photo-generated electronhole pairs, limited ability to absorb visible light [62], and relatively low stability when exposed to an aqueous solution [63]. These drawbacks inherently impose constraints on ZnO's effectiveness in solar energy conversion.…”

Section: Photoactive Znomentioning

confidence: 99%

ZnO for Photoelectrochemical Hydrogen Generation

Bakranova,

Nagel

2023

Clean Technol.

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The rise in the Earth’s surface temperature on an annual basis has stimulated scientific and engineering interest in developing and implementing alternative energy sources. Besides cost, the main requirements for alternative energy sources are renewability and environmental friendliness. A prominent representative that allows the production of “green” energy is the conversion of solar photons into a practical energy source. Among the existing approaches in solar energy conversion, the process of photoelectrochemical (PEC) hydrogen extraction from water, which mimics natural photosynthesis, is promising. However, direct decomposition of water by sunlight is practically impossible since water is transparent to light waves longer than 190 nm. Therefore, applying a photoelectrochemical process using semiconductor materials and organic compounds is necessary. Semiconductor materials possessing appropriately positioned valence and conduction bands are vital constituents of photoelectrodes. Certain materials exhibit semiconductor characteristics that facilitate the reduction-oxidation (RedOx) reaction of water (H2O) under specific circumstances. ZnO holds a unique position in the field of photocatalysis due to its outstanding characteristics, including remarkable electron mobility, high thermal conductivity, transparency, and more. This article offers an overview of studies exploring ZnO’s role as a photocatalyst in the generation of hydrogen from water.

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“…As a result of the successive deposition of these structures onto conductive glass, a spiral heterocomposite WO 3 /(W, Mo)-BiVO 4 with a length of 5.5 μm was obtained and the photocurrent density exceeded 3.9 mA/cm 2 . The process of making triple transitions is possible using various techniques, such as electrochemical reduction-oxidation technology [181], a hybrid synthetic method, including electrodeposition and hydrothermal treatment [182], a solvothermal-calcination process [183], an electrostatic-driven self-assembly correlated with ion-exchange process [162] and a polymer complex method [184]. Jun Lv et al obtained photoactive LiCr(WO 4 ) 2 .…”

Section: Ternary Systems For Efficient Water Decompositionmentioning

confidence: 99%

Photoactive Nanomaterials

2021

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Constructing ZnO/ZnCr2O4@TiO2-NTA Nanocomposite for Photovoltaic Conversion and Photocatalytic Hydrogen Evolution

Cited by 9 publications

References 39 publications

Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

ZnO for Photoelectrochemical Hydrogen Generation

Photoactive Nanomaterials

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