A red anatase TiO2 photocatalyst for solar energy conversion

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	A red anatase TiO2 photocatalyst for solar energy conversion
	G. Liu ; L. C. Yin ; J. Q. Wang ; P. Niu ; C. Zhen ; Y. P. Xie ; H. M. Cheng
刊名	Energy & Environmental Science
	2012
卷号	5 期号:11 页码:9603-9610
关键词	visible-light irradiation augmented-wave method titanium-dioxide oxide photocatalysts hydrogen-production surface science basis-set nitrogen water boron
ISSN号	1754-5692
中文摘要	Narrowing the bandgap of wide-bandgap semiconductor photocatalysts (for instance, anatase TiO2) by introducing suitable heteroatoms has been actively pursued for increasing solar absorption, but usually suffers from a limited thermodynamic/kinetic solubility of substitutional dopants in bulk and/or dopant-induced recombination centres. Here we report a red anatase TiO2 microsphere with a bandgap gradient varying from 1.94 eV on its surface to 3.22 eV in its core by a conceptually different doping approach for harvesting the full spectrum of visible light. This approach uses a pre-doped interstitial boron gradient to weaken nearby Ti-O bonds for the easy substitution of oxygen by nitrogen, and consequently it substantially improves the nitrogen solubility. Furthermore, no nitrogen-related Ti3+ was formed in the red TiO2 due to a charge compensation effect by boron, which inevitably occurs in common nitrogen doped TiO2. The red anatase TiO2 exhibits photoelectrochemical water splitting activity under visible light irradiation. The results obtained may shed light on how to increase high visible light absorbance of wide-bandgap photocatalysts.
原文出处	://WOS:000310006200046
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/60109]
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	G. Liu,L. C. Yin,J. Q. Wang,et al. A red anatase TiO2 photocatalyst for solar energy conversion[J]. Energy & Environmental Science,2012,5(11):9603-9610.
APA	G. Liu.,L. C. Yin.,J. Q. Wang.,P. Niu.,C. Zhen.,...&H. M. Cheng.(2012).A red anatase TiO2 photocatalyst for solar energy conversion.Energy & Environmental Science,5(11),9603-9610.
MLA	G. Liu,et al."A red anatase TiO2 photocatalyst for solar energy conversion".Energy & Environmental Science 5.11(2012):9603-9610.