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
刊名	Journal of Materials Chemistry
	2012
卷号	22 期号:14 页码:6746-6751
关键词	light-driven photocatalysts augmented-wave method visible-light hydrogen-production tungsten-oxide tio2 water surface nanocrystals efficiency
ISSN号	0959-9428
中文摘要	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.
原文出处	://WOS:000301459500034
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/60359]
专题	金属研究所_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.