磁场对TiO_2光催化降解水中微量氯苯的影响  

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] 

机构地区：[1]华东理工大学资源与环境工程学院,上海200237

出　　处：《华东理工大学学报（自然科学版）》2003年第2期166-169,共4页Journal of East China University of Science and Technology

基　　金：国家自然科学基金资助项目(29877007)

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.

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 

分 类 号：TU991.2[建筑科学—市政工程]