Photocatalytic elimination of aqueous 2-methyl-4-chlorophenoxyacetic acid in the presence of commercial and nitrogen-doped TiO2

被引：0
作者：
J. Rivas
R. R. Solis
O. Gimeno
J. Sagasti
机构：
[1] Universidad de Extremadura,Departamento de Ingeniería Química y Química Física, Facultad de Ciencias
来源：
International Journal of Environmental Science and Technology | 2015年 / 12卷
关键词：
Black light; Herbicides; Photocatalysis; Reaction mechanism; Titania;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
An attempt to synthesize an active photocatalyst for 2-methyl-4-chlorophenoxyacetic acid removal has been accomplished. Black light (main emission wavelength at 365 nm) photocatalytic experiments with bare and N-doped titania have been carried out, and the results compared to those obtained in the presence of titania Degussa P-25. Doping percentage and calcination temperature influences have been investigated in photocatalytic runs using pure and commercial 2-methyl-4-chlorophenoxyacetic acid. In no case, the results obtained with synthesized titania improved the activity of P-25. Some kinetic tests allowed for the proposal of a pseudoempirical reaction mechanism capable of acceptably simulating the process in the presence of P-25. From the proposed mechanism, the roles played by hydroxyl, peroxyl and organic radicals have been suggested.
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页码：513 / 526
页数：13
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