Origin of photoactivity of oxygen-deficient TiO2 under visible light

被引：26
|
作者：
Lo, Hsin-Hsi
Gopal, Neeruganti O.
Ke, Shyue-Chu [1 ]
机构：
[1] Natl Dong Hwa Univ, Dept Phys, Hualien 97401, Taiwan
来源：
APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 08期
关键词：
catalysts; doping profiles; nitrogen; oxidation; photochemistry; reduction (chemical); semiconductor doping; semiconductor materials; titanium compounds; vacancies (crystal); PHOTOCATALYTIC ACTIVITY; NITROGEN; NANOPARTICLES; DEFECTS; ANATASE; SITES;
D O I：
10.1063/1.3216585
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
As it is now well established that oxygen vacancies are spontaneously introduced during nitrogen doping of anatase TiO2, there is a lively debate on whether nitrogen dopant or oxygen vacancy contributes to the visible light photoactivity of the doped catalyst. We showed that the coordinately unsaturated Ti site is integral to the visible light photoactivity in anatase oxygen-deficient TiO2 catalyst. Accordingly, oxygen vacancies may contribute to the visible light photoactivities in N-doped TiO2 and other nonmetallic ion-doped TiO2 as well. A redox active visible light photocatalyst has been developed based on oxygen-deficient structure in anatase TiO2.
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页数：3
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