负载型TiO_2光催化氧化水中微量环己烷  

Photo-catalytic Oxidation Process for Removal of Trace-amount of Cyclohexane from Water by Immobilized TiO_2

作　　者：李继洲[1] 林逢凯[1] 王郁[1] 胥峥[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：《中国给水排水》2002年第12期1-4,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目 (2 98770 7)

摘　　要：GC MS分析结果表明 ,水中微量环己烷在负载型TiO2 光催化氧化作用下生成了环己醇、环己酮等中间产物。当pH值为 5 .2～ 8.9时 ,环己烷光催化氧化过程受溶液pH值的影响较小 ,反应速率基本保持不变 ;溶液pH值较低 (pH =2 .0 )时环己烷的光催化氧化速率减小 ,而pH值较高 (pH =12 .0 )时则能促进这一过程的进行。溶液中无机阴离子 (如SO2 -4)的存在能抑制环己烷的光催化氧化过程 ,而光照距离的减小 (即光强增大 )则能加快降解速率。Cyclohexanol and cyclohexanone were detected by GC/MS after photocatalytic oxidation of trace amount of cyclohexane in water by immobilized TiO 2.At pH of 5.2～8.9, photocatalytic oxidation of cyclohexane was less affected and rate of the reaction was basically kept unchanged. At lower pH of 2.0, photocatalytic oxidation rate of cyclohexane was decreased and at higher pH of 12.0 it was accelerated. The presence of inorganic anions, such as SO 4 2- , would inhibit the photocatalytic oxidation process of cyclohexane and reduction of illumination distance (that is, increasing of illumination intensity) would result in accelerating the degradation rate.

关 键 词：微量环己烷 负载型TIO2 光催化氧化 机理 废水处理 催化 

分 类 号：O643.3[理学—物理化学]