期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
卷 178, 期 1, 页码 1-7出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2005.06.012
关键词
photocatalytic degradation; nano-TiO2; nitrobenzene; nitrophenol; chloronitrobenzene; kinetic analysis; combustion-synthesized catalyst; Degussa P-25
The photocatalytic degradation of nitrobenzene and substituted nitrobenzenes under UV exposure was investigated with combustion synthesized nano-TiO2 and commercial TiO2 catalyst, Degussa P-25. The experimental data indicated that the photodegradation kinetics was first order. The photocatalytic degradation rates were considerably higher when catalyzed with combustion synthesized TiO2 compared to that of Degussa P-25. The degradation rate coefficients followed the order: 1-chloro,14-dinitrobenzene similar or equal to 4-nitrophenot > 2-nitrophenol > 1-chloro.4-nitrobenzene > 3-niti-ophenol > 2,4-dinitrophenol > 1-chloro,2-nitrobenzene > nitrobenzene > 1,3-dinitrobenzene. Plausible mechanisms and reasons for the observation of the above order are discussed. (c) 2005 Elsevier B.V. All rights reserved.
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