期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 187, 期 1-3, 页码 509-516出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2011.01.062
关键词
C-doped TiO2; Visible light; Photocatalytic activity; Nanojunction; Platinum; Toluene
资金
- National High Technology Research and Development Program ('863'Program) of China [J20100308]
- Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control [2010B01]
- Ministry of Education, China
- National Natural Science Foundation of China [NSFC-50808156]
- Program for Chongqing Innovative Research Team Development in University [KJTD201020]
- Chongqing Key Natural Science Foundation (CSTC) [2008BA4012]
- Research Grants Council of Hong Kong [PolyU 5204/07E, PolyU 5175/09E]
- Hong Kong Polytechnic University [GU712, GYX75, GYX0L]
C-dopei TiO2 nanoparticles prepared by partial oxidation of TiC were modified with Pt species by impregnation-calcination method in order to enhance the visible light photocatalytic activity. The physicochemical properties of as-prepared samples were characterized by various techniques in detail. The results indicated that a novel Pt/C-doped TiO2/PtCl4 three-component nanojunction system was formed, where C-doped TiO2 and PtCl4 behaved as two visible light responsive components, and Pt metal as electron-transfer system. The three-component nanojunctioned photocatalyst system exhibited six times higher visible light activity than that of the pristine C-doped TiO2 in degradation of toluene in air. The dramatically enhanced activity can be attributed to the increased utilization of visible light, the enhanced charge carrier separation and transfer process. Further more, the band structure and photocatalysis mechanism over the three-component nanojunction system was proposed and discussed. This work may provide new insights into the design of novel multi-component photocatalyst system with efficient visible tight activity. (C) 2011 Elsevier B.V. All rights reserved.
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