Photocatalytic degradation of pentachlorophenol on TiO2 sol-gel catalysts

被引：104

作者：

Pecchi, G

Reyes, P

Sanhueza, P

Villaseñor, J

机构：

[1] Univ Concepcion, Fac Ciencias Quim, Dept Fisicoquim, Concepcion, Chile

[2] Univ Talca, Inst Quim Recursos Nat, Talca, Chile

来源：

CHEMOSPHERE | 2001年 / 43卷 / 02期

关键词：

photocatalysis; pentachlorophenol; TiO2; sol-gel;

D O I：

10.1016/S0045-6535(00)00265-4

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The photocatalytic degradation of pentachlorophenol (PCP) in aqueous solution was investigated using TiO2 catalysts. The samples were prepared by the sol-gel method using different gelation pH and different calcination temperatures. The solids were characterized by specific surface area, X-lay diffraction, UV-Vis absorbance, FTIR and pentachlorophenol adsorption. The catalytic activity of the solids was evaluated in a conventional photoreactor at 298 K using 30 ppm of pentachlorophenol. It was found that the reaction follows a first-order reaction and the kinetic constant values change slightly with the pH of gelation and more significantly with the calcination temperature. (C) 2001 Elsevier Science Ltd. All rights reserved.

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页码：141 / 146

页数：6

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