Hydrogen-terminated mesoporous silicon monoliths with huge surface area as alternative Si-based visible light-active photocatalysts

Li, Ting, Li, Jun, Zhang, Qiang, Blazeby, Emma, Shang, Congxiao, Xu, Hualong, Zhang, Xixiang and Chao, Yimin (2016) Hydrogen-terminated mesoporous silicon monoliths with huge surface area as alternative Si-based visible light-active photocatalysts. RSC Advances, 75. pp. 71092-71099. ISSN 2046-2069

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Abstract

Silicon-based nanostructures and their related composites have drawn tremendous research interests in solar energy storage and conversion. Mesoporous silicon with huge surface area of 400 - 900 m2g-1 developed by electrochemical etching exhibits excellent photocatalytic ability and stablility after 10 cycles in degrading methyl orange under visible light irradiation, owing to the unique mesoporous network, abundant surface hydrides and efficient light harvesting. This work showcases the profound effects of surface area, crystallinity, pore topology on charge igration/recombination and mass transportation. Therein the ordered 1D channel array has outperformed the interconnected 3D porous network by greatly accelerating the mass diffusion and enhancing the accessibility of the active sites on the extensive surfaces.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
Faculty of Science > School of Environmental Sciences
Depositing User: Pure Connector
Date Deposited: 24 Sep 2016 00:07
Last Modified: 28 Oct 2020 00:52
URI: https://ueaeprints.uea.ac.uk/id/eprint/59837
DOI: 10.1039/C6RA09474K

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