Phenol destruction by photocatalysis on TiO2: an attempt to solve the reaction mechanism

被引：275

作者：

Sobczynski, A ^{[1
]}

Duczmal, L ^{[1
]}

Zmudzinski, W ^{[1
]}

机构：

[1] Poznan Univ Econ, Fac Commod Sci, PL-60967 Poznan, Poland

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2004年 / 213卷 / 02期

关键词：

photocatalysis; titania; phenol; kinetics; intermediates; mechanism;

D O I：

10.1016/j.molcata.2003.12.006

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Six hydroxylated aromatic compounds, p-benzoquinone and four aliphatic compounds were detected as intermediates of the reaction of phenol photocatalytic oxidation in the presence of illuminated TiO2. The concentration of catechol, hydroquinone and p-benzoquinone was determined quantitatively along with that of phenol in the course of the photoreaction. The reactions of TiO2-photooxidation of phenol and its primary intermediates-dihydroxybenzenes show 1st order behaviour. The use of initial reaction rates for kinetic studies is recommended because of many competitive reactions in illuminated suspensions of titanium dioxide. A possible mechanism of phenol full mineralisation is presented. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：225 / 230

页数：6

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