期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 33, 期 2, 页码 119-125出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0926-3373(01)00170-9
关键词
photodegradation; dye sensitization; TiO2 photocatalyst; organic pollutants; visible light; thionine; eosin Y
Photodegradation of organic pollutants, viz. phenol, chlorophenol, 1,2-dichloroethane and trichloroethylene in water has been achieved on the surface of TiO2 semiconductor modified with thionine and eosin Y by using visible light. After 5 h of irradiation with a 50 W tungsten lamp, over 55-72% degradation of pollutants is achieved. A working mechanism involving excitation of surface bound dye, followed by charge injection into the TiO2 conduction band is proposed. (C) 2001 Elsevier Science B.V All rights reserved.
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