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, mmethyl benzaldehyde and 2,6dimethylphenol, were detected by means of GC/MS analysis after photocatalytic oxidation of soluble mxylene in water by immobilized nanometer TiO2 under the irradiation of highpressure 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 mxylene in water from 6.68mg/L to 17.36mg/L, the apparent rate constant of the reaction decreases and halflife time of the reaction increases with the increase of initial concentration of mxylene in water.
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170-172,共3页
Journal of East China University of Science and Technology
基金
国家自然科学基金资助项目(2987707)
