文献类型：期刊文献

中文题名：磁场对TiO_2光催化降解水中微量氯苯的影响

英文题名：Effect of Permanent Magnetic Field on the Photo-catalytic Degradation of Soluble Chlorobenzene in Water with TiO_2

作者：姜焕伟[1];王郁[1];林逢凯[1];胥峥[1];李涵[1]

机构：[1]华东理工大学资源与环境工程学院,上海200237

年份：2003

卷号：29

期号：2

起止页码：166

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：2003257514408);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(29877007)

语种：中文

中文关键词：负载型纳米TiO2光催化剂;磁化—光催化降解;微量氯苯;磁动力化学;降解机理;饮用水处理

外文关键词：fixed nanometer TiO_2; magnetic-photo-catalytic degradation; chlorobenzene in micro-pollution level; magnetokinetics; degradation mechanism

摘要：在外加固定磁场作用下,使用玻璃弹簧负载型纳米TiO2作为光催化剂,对水中微量氯苯(<10mg/L)进行光催化降解。结果表明,氯苯磁化-TiO2光催化耦合降解过程符合一级反应动力学。磁场场强为0.32T时,氯苯光催化降解反应的速率常数比无磁场时提高了12.5%;当磁场场强下降时,磁场对氯苯光催化降解的促进作用也开始减小。氯苯光催化降解的中间产物是邻氯苯酚和间氯苯酚,探讨了磁场促进氯苯TiO2光催化降解的机理。
The photocatalytic degradation processes of soluble chlorobenzene in water by using fixed nanometer TiO2 as photocatalyst coupled under a permanent magnetic filed were studied. The results show that kinetics of the photocatalytic degradation process of chlorobenzene is of the first order. The photocatalytic rate constant of chlorobenzene under 0.32T magnetic induction increases by 12.5%. The photocatalytic degradation efficiencies positively correspond to the magnetic induction. The intermediates of chlorobenzene are o and pchlorophenol. The mechanism of photocatalytic degradation for chlorobenzene under a permanent magnetic field was also discussed.