负载型TiO_2制备及其对茜素红的降解研究  

Preparation of supported TiO_2 and its behaviors for degradation of alizarin red

作　　者：付文[1] 刘安华[1] 张利利[1] 陈燕忠[1] 

机构地区：[1]华南理工大学材料学院,广东广州510640

出　　处：《工业催化》2007年第11期54-58,共5页Industrial Catalysis

基　　金：国家自然科学基金资助项目(29974009)

摘　　要：以钛酸四丁酯和正硅酸乙酯为前驱体、冰醋酸为水解抑制剂,用溶胶-凝胶法制备纳米TiO2/SiO2复合物。通过X-射线衍射、红外光谱和比表面积仪等测试手段进行了分析,结果表明,纳米TiO2/SiO2粒子焙烧后主要以锐钛型存在,有Ti—O—Si键的产生,复合粒子的比表面积达到389 m2.g-1。光催化结果表明,n(Ti)∶n(Si)=3和焙烧温度为700℃的TiO2/SiO2粒子对茜素红溶液的降解性能最好。利用气质联用仪对降解产物进行了分析。Nanoparticle TiO2/SiO2 was prepared by sol-gel method using tetraethylorthosilicate and tetrabutylorthotitanate as precursors and glacial acetic acid as hydrolysis inhibitor. XRD, FT-IR and BET resuits showed that the crystalline phase was anatase, Ti--O--Si bonds formed, and surface area of the catalyst was 389 m2 · g^-1. Photoeatalytie reaction results for degradation of alizarin red showed that TiO2/SiO2 with Ti/Si mole ratio of 3 and calcined at 700 ℃ had the best catalytic property. The degradation products were analyzed by GC-MS.

关 键 词：纳米TiO2/SiO2 溶胶-凝胶法 茜素红 降解 

分 类 号：TQ426.94[化学工程] X788[环境科学与工程—环境工程]