文献类型：期刊文献

中文题名：负载型纳米TiO_2光催化降解水中微量间二甲苯的动力学机理

英文题名：Kinetics Mechanism of Photo-catalytic Oxidation for Soluble m-Xylene in Water by Immobilized Nanometer TiO_2

作者：李继洲[1];林逢凯[1];王郁[1];胥峥[1]

机构：[1]华东理工大学资源与环境工程学院

年份：2003

卷号：29

期号：2

起止页码：170

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;EI(收录号：2003257514409);Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金资助项目(2987707)

语种：中文

中文关键词：负载型纳米TiO2光催化剂;光催化氧化;间二甲苯;动力学;表现一级反应;废水处理

外文关键词：immobilized nanometer TiO_2; photo-catalytic oxidation; m-xylene; kinetics; apparent first-order reaction

摘要：GC/MS分析表明:水中微量间二甲苯在以高压汞灯为光源,负载型纳米TiO2为光催化剂的作用下生成了间甲基苯甲醛和2,6-二甲基苯酚等中间产物。初始浓度在6.68mg/L～17.36mg/L,水中微量间二甲苯的光催化氧化过程不是一个简单的反应,反应可由一级反应动力学方程拟合,其表观速率常数随着溶液初始浓度的增大而减小,半衰期则随溶液初始浓度的增大而增加。
The intermediates, mmethyl benzaldehyde and 2,6dimethylphenol, were detected by means of GC/MS analysis after photocatalytic oxidation of soluble mxylene in water by immobilized nanometer TiO2 under the irradiation of highpressure Hg lamp. It is shown that this reaction is not simple and is in conformity with the equation of first order kinetics in appearance. At the initial concentration of mxylene in water from 6.68mg/L to 17.36mg/L, the apparent rate constant of the reaction decreases and halflife time of the reaction increases with the increase of initial concentration of mxylene in water.