纳米TiO_2光催化降解对甲基苯磺酸的研究  

Degradation of 4-toluene sulfonic acid by photocatalysis of nano-TiO_2

作　　者：钟先锦[1] 张凌[1] 李德亮[1] 李桂敏[1] 陶莹 

机构地区：[1]河南大学化学化工学院,开封475001 [2]开封市环境科研设计所,开封475000

出　　处：《环境科学学报》2007年第11期1835-1839,共5页Acta Scientiae Circumstantiae

基　　金：河南省国际科技合作项目(No.0546640002)~~

摘　　要：采用TiO2/UV光催化降解法处理对甲基苯磺酸的水溶液,探讨了二氧化钛的投加量、溶液的初始浓度、溶液的pH、紫外光照射时间和强度、常见无机离子等因素对对甲基苯磺酸的降解效率的影响.结果表明,在浓度为0.030g·L-1对甲基苯磺酸溶液中,光催化剂TiO2最佳投加量为0.10g·L-1,控制空气分压为5.2kPa,紫外光照射2h,溶液为中性时,对甲基苯磺酸废水降解率达到67.4%.二氧化钛的用量、溶液的pH是影响纳米TiO2光催化降解对甲基苯磺酸的主要因素.在此基础上还考察了无机阳离子和无机阴离子对反应的影响,并取得了满意的效果.Photocatalytic degradation of 4-Toluene sulfonic acid in aqueous solution by TiO2 under UV irradiation was studied. The effects of quantity of TiO2 , concentration of 4-Toluene sulfonic acid,time and intensity of UV radiation, pH value of solution, and common inorganic ions was investigated. The results show that the optimal quantity of TiO2 was 0.10 g·L^-1 in 0. 030 g·L^-1 4-Toluene sulfonic acid solution under an air pressure of 5.2 kPa. Under those conditions, the degradation efficiency of 4-Toluene sulfonic acid was 67.4 % after 2 h UV irradiation at pH 7. The quantity of TiO2 and solution pH were the main factors affecting the degradation of4-Toluene sulfonic acid by nano-TiO2. The influences of some common inorganic ions were also studied, and the result was satisfying.

关 键 词：纳米TIO2 对甲基苯磺酸 光催化降解 

分 类 号：X703.1[环境科学与工程—环境工程]