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
	2012
发表期刊	Energy & Environmental Science
ISSN	1754-5692
卷号	5 期号:11 页码:9603-9610
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.
部门归属	[liu, gang; yin, li-chang; niu, ping; zhen, chao; xie, yingpeng; cheng, hui-ming] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [wang, jianqiang] chinese acad sci, shanghai inst appl phys, shanghai synchrotron radiat facil, shanghai 201800, 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.;cheng@imr.ac.cn
关键词	Visible-light Irradiation Augmented-wave Method Titanium-dioxide Oxide Photocatalysts Hydrogen-production Surface Science Basis-set Nitrogen Water Boron
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60109
专题	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.