ZnO for Photoelectrochemical Hydrogen Generation
Bakranova D. Nagel D.
December 2023Multidisciplinary Digital Publishing Institute (MDPI)
Clean Technologies
2023#5Issue 41248 - 1268 pp.
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.
nanocomposites , photocatalysis , plasmonic , thin films , ZnO
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School of Natural and Social Sciences, Kazakh-British Technical University, Almaty, 050000, Kazakhstan
Research Group altAir Nanolab, Almaty, 050000, Kazakhstan
Department of Electrical Engineering, School of Engineering and Applied Science, George Washington University, Washington, 200052, DC, United States
School of Natural and Social Sciences
Research Group altAir Nanolab
Department of Electrical Engineering
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