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 photocatalytic degradation processes of soluble chlorobenzene in water by using fixed nanometer TiO2 as photocatalyst coupled under a permanent magnetic filed were studied. The results show that kinetics of the photocatalytic degradation process of chlorobenzene is of the first order. The photocatalytic rate constant of chlorobenzene under 0.32T magnetic induction increases by 12.5%. The photocatalytic degradation efficiencies positively correspond to the magnetic induction. The intermediates of chlorobenzene are o and pchlorophenol. The mechanism of photocatalytic degradation for chlorobenzene under a permanent magnetic field was also discussed.
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
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)
