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(Mo + N) codoped TiO2 for enhanced visible-light photoactivity |
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| Authors: | Hailin LiuZhihong Lu ling YueJing Liu Zhanghua GanChang Shu Ting ZhangJing Shi Rui Xiong |
| Affiliation: | a Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, PR China b School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, PR China c Hubei Key Laboratory on Organic and Polymeric Opto-electronic Materials, Wuhan 430072, PR China |
| Abstract: | 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. |
| Keywords: | (Mo + N) codoped TiO2 Photoactivity Sol-gel method First-principles band structure calculations |
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