文献类型：期刊文献

中文题名：掺银负载型TiO_2光催化剂降解水中氯苯的动力学研究

英文题名：Photocatalytic Degradation of Chlorobenzene Using Immobilized TiO_2-Ag Catalyst

作者：蒋晓凤[1];赵一先[1];盛兆琪[1]

机构：[1]华东理工大学环境工程系,上海200237

年份：2005

卷号：31

期号：1

起止页码：122

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：2005149026117);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：负载型二氧化钛;光催化剂;光催化降解;氯苯;动力学

外文关键词：immobilized TiO_2(titanium dioxide); photocatalyst; photocatalytic degradation; chlorobenzene; kinetics

摘要：用粉末溶胶法,以γ-Al2O3为中间载体在不锈钢薄板上制备掺杂银的新型负载型TiO2光催化剂,对水中的氯苯进行光催化降解。研究表明:在实验的浓度范围内,反应服从一级反应动力学规律,为表观一级反应,反应速率常数k1与初始浓度C0的关系为:lnk1=-0.30lnC0-2.29;二氧化钛中适当掺杂银,可以提高其催化活性;溶液在碱性条件下,有利于反应的进行;随着光辐射强度的增加,反应速率常数呈增大的趋势;氯苯可脱去氯代基,转化为无毒害的无机氯离子。
Photocatalytic degradation (PCD) of chlorobenzene was performed using immobilized Ag supplemented TiO2 catalyst. The procedure for preparing the innovative catalyst is documented. Within the initial concentration of 34-157 mg/L, the experimental results were best described by the apparent first order reaction, and the effect of initial concentration on the rate constant was: lnk1 = -0.30lnC0 - 2.29. The catalyst prepared from the mixture with an n(Ag):n(TiO2)of 1:8 had the best enhancement effect, 24.2% increase in the first order rate constant. The PCD rate constant also increased with increasing feed pH and/or radiation intensity. That dechlorination was accomplished by PCD of chlorobenzene was demonstrated by the quantitative increases in the chloride ions as predicted.