Ag掺杂改性TiO_2催化降解水体中的邻苯二甲酸二甲酯  

Study on Photocatalytic Degradation of Dimethyl Phthalate(DMP) in Aqueous Solution by Ag Doping TiO_2

作　　者：景伟文[1] 李君[1] 康志强[2] 刘义轩[1] 张松梅[1] 

机构地区：[1]新疆农业大学化学工程学院,乌鲁木齐830052 [2]山东省环境监测中心站,济南250012

出　　处：《贵金属》2012年第3期27-32,共6页Precious Metals

基　　金：新疆维吾尔自治区高校科研计划青年教师科研启动基金(XJEDU2009S40);大学生创新基金

摘　　要：邻苯二甲酸酯是环境中普遍存在的有机污染物(内分泌干扰物)之一。通过湿式机械混合法制备了Ag掺杂改性TiO2催化剂。光催化降解实验结果表明Ag掺杂浓度为1×10-4mol/g,焙烧活化处理温度为400℃下所得的催化剂活性较好。对降解体系的研究表明,当催化剂的投加量为0.1～0.3 g/L、pH=5～8时降解效率较高(62.0%)。相对于催化剂的降解过程而言,催化剂颗粒对污染物的吸附作用较小,因此光催化反应主要以降解过程为主。最后利用荧光光谱对催化剂的性能进行了初步表征。Phthalic acid esters have become a kind of widespread environmental organic pollutants （Envi- ronmental Hormone）. Ag doping TiO2 modified catalyst was prepared by damp mechanically - mixing method. In the test of photocatalytic reaction, The results showed that the The performance of the photocat- alysts can be improved under the conditions of Ag concentration 1 × 10-4 mol/g and the calcination tem- perature 400℃. The study of degradation system showed that When the amount of the catalyst was 0.1 - 0.3 g/L and pH value was 5 -8, the degradation rate of solution reached a better level （62.01%）. In comparison with photodegradation process, the absorption of dimethyl phthalate to the catalyst particles was relatively small, so photodegradation reaction was a more primary process. Finally, Ag doping TiO2 modified catalyst was characterized by FT.

关 键 词：物理化学 Ag掺杂改性TiO2催化剂 光降解 邻苯二甲酸二甲酯 

分 类 号：O643.36[理学—物理化学]