Crystal facet-dependent photocatalytic oxidation and reduction reactivity of monoclinic WO3 for solar energy conversion

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	Crystal facet-dependent photocatalytic oxidation and reduction reactivity of monoclinic WO3 for solar energy conversion
	Y. P. Xie; G. Liu; L. C. Yin; H. M. Cheng
	2012
发表期刊	Journal of Materials Chemistry
ISSN	0959-9428
卷号	22 期号:14 页码:6746-6751
摘要	The reactivity of a photocatalyst is basically influenced by its surface atomic and linked electronic structure. Tuning different crystal facets is becoming an important strategy to optimize the reactivity of a photocatalyst for targeted reactions. Here we report a facile and new route of synthesizing a quasi-cubic-like WO3 crystal with a nearly equal percentage of {002}, {200} and {020} facets, and a rectangular sheet-like WO3 crystal with predominant {002} facet by controlling acidic hydrolysis of crystalline WB. As a result of electronic structure effects induced by crystal facet, the quasi-cubic-like WO3 crystal with a deeper valence band maximum shows a much higher O-2 evolution rate in photocatalytic water oxidation than the rectangular sheet-like WO3 crystal. The latter, with an elevated conduction band minimum of 0.3 eV, is able to photoreduce CO2 to generate CH4 in the presence of H2O vapor.
部门归属	[xie, ying peng; liu, gang; yin, lichang; cheng, hui-ming] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;liu, g (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china.;gangliu@imr.ac.cn
关键词	Light-driven Photocatalysts Augmented-wave Method Visible-light Hydrogen-production Tungsten-oxide Tio2 Water Surface Nanocrystals Efficiency
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60359
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. P. Xie,G. Liu,L. C. Yin,et al. Crystal facet-dependent photocatalytic oxidation and reduction reactivity of monoclinic WO3 for solar energy conversion[J]. Journal of Materials Chemistry,2012,22(14):6746-6751.
APA	Y. P. Xie,G. Liu,L. C. Yin,&H. M. Cheng.(2012).Crystal facet-dependent photocatalytic oxidation and reduction reactivity of monoclinic WO3 for solar energy conversion.Journal of Materials Chemistry,22(14),6746-6751.
MLA	Y. P. Xie,et al."Crystal facet-dependent photocatalytic oxidation and reduction reactivity of monoclinic WO3 for solar energy conversion".Journal of Materials Chemistry 22.14(2012):6746-6751.