期刊
APPLIED SURFACE SCIENCE
卷 257, 期 22, 页码 9355-9361出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2011.05.085
关键词
(Mo plus N) codoped TiO2; Photoactivity; Sol-gel method; First-principles band structure calculations
类别
资金
- 973 Program [2009CB939705]
- Chinese National Foundation of Natural Science [51001083, 10974148]
- Chinese National Science Fund for Talent Training in Basic Science [J0830310]
- Wuhan University [5082003]
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials (Hubei University)
A series of Ti1-xMoxO2-yNy samples were prepared by using sol-gel method and characterized by X-ray diffraction, transmission electron microscopy and UV-vis absorption spectroscopy. All Ti1-xMoxO2-yNy samples are anatase phase. It is found that Mo, N mono-doping can increase visible light absorption, while (Mo + N) co-doping can greatly enhance absorption in whole visible region. Results of our first-principles band structure calculations reveal that (Mo + N)-doping, especially passivated co-doping can increase the up-limit of dopant concentration and create more impurity bands in the band gap of TiO2, which leads to a greatly increase of its visible-light absorption without a decrease of its redox potential. It reveals that (Mo + N) co-doped TiO2 is promising for a photocatalyst with high photocalystic activity under visible light. (C) 2011 Elsevier B.V. All rights reserved.
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