Pb^(2+)-SiO_2-TiO_2复合催化剂的制备及光催化性能  

Preparation and Photocataiytic Activity of Pb^(2+)-SiO_2-TiO_2 Composite Catalyst

作　　者：吕亚洲[1] 邱祖民[2] 

机构地区：[1]南昌大学理学院,江西南昌330031 [2]南昌大学环境与化学工程学院,江西南昌330031

出　　处：《南昌大学学报（工科版）》2011年第2期112-116,共5页Journal of Nanchang University(Engineering & Technology)

基　　金：江西省自然科学基金资助项目(2009GZH0075);江西省主要学科学术带头人培养对象资助项目(赣科发计字[2006]155号)

摘　　要：以钛酸四丁酯、正硅酸乙酯和硝酸铅为主要原料,采用溶胶-凝胶法制备了Pb2+-SiO2-TiO2复合催化剂,分别用X射线衍射(XRD)、UV-Vis和FT-IR对其进行了表征;以模拟太阳光下甲基橙的光催化降解为模型反应,对Pb2+改性硅钛复合材料的光催化活性进行了评价。结果表明:Pb2+最佳掺杂量为1.5%(质量分数),最佳热处理温度为500℃。用Pb2+-SiO2-TiO2催化剂光催化降解浓度10 mg/L的甲基橙溶液,反应3 h后甲基橙的降解率达90.0%以上。Pb2＋-SiO2-TiO2 composite catalysts were prepared by sol-gel method using materials of tetrabutyl titanate,tetraetethyl orthosilicate and lead nitrate.Properties of the catalyst were characterized by techniques of XRD,UV-Vis and FT-IR.In addition,the photocatalytic activities of Pb2＋ doped silicon-titanium composite samples were evaluated by the model of photocatalytic degradation of methyl orange under simulated sunlight.The results showed that the optimum doping concentration was 1.5%（mass fraction） and the heat treatment temperature was 500 ℃.The photocatalytic degradation rate of methyl orange（10 mg/L） could reach above 90.0% under simulated sunlight after 3 h.

关 键 词：光催化 铅 二氧化钛 甲基橙 

分 类 号：TQ134.1[化学工程—无机化工]