NDLI: Highly efficient photocatalysts constructed by rational assembly of dual-cocatalysts separately on different facets of BiVO<sub>4</sub>

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Energy & Environmental Science Vol - 7 Issue - 3

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Highly efficient photocatalysts constructed by rational assembly of dual-cocatalysts separately on different facets of BiVO₄

Content Provider	Royal Society of Chemistry (RSC)
Author	Wang, Donge Li, Rengui Han, Hongxian Li, Can Zhang, Fuxiang
Copyright Year	2014
Abstract	Cocatalysts play important roles in promoting the catalytic reactions of semiconductor photocatalysts. Especially, deposition of dual cocatalysts, i.e., oxidation and reduction cocatalysts, onto a semiconductor photocatalyst can significantly improve its photocatalytic activity due to the synergetic effect of rapid consumption of photogenerated electrons and holes. However, in most cases, the cocatalysts are randomly deposited onto the semiconductor photocatalysts, where the cocatalysts cannot function fully. Herein, based on the findings that photogenerated electrons and holes can be spatially separated onto the different facets of BiVO4, we have successfully prepared two types of photocatalysts (M/MnOx/BiVO4 and M/Co3O4/BiVO4, where M stands for noble metals) with reduction and oxidation cocatalysts selectively deposited onto the {010} and {110} facets of BiVO4 by a photo-deposition method. Remarkably enhanced photocatalytic activities were observed for such assembled photocatalysts in control experiments of photocatalytic water oxidation and photocatalytic degradation of methyl orange and rhodamine B. In-depth investigations show that the enhanced photocatalytic performances are due to not only the intrinsic nature of charge separation between the {010} and {110} facets of BiVO4, but also the synergetic effect of dual-cocatalysts deposited onto the different facets of BiVO4. This work further proves the feasibility of the general concepts for approaching efficient artificial photosynthesis systems, namely, engineering of crystal-based photocatalysts by selective deposition of suitable reduction and oxidation cocatalysts onto the different facets of light absorbing semiconductor crystals.
Starting Page	1369
Ending Page	1376
Page Count	8
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	7
Issue Number	4
Journal	Energy & Environmental Science
DOI	10.1039/c3ee43304h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Semiconductor Photocatalysis Methyl orange Rhodamine Artificial photosynthesis
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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