TiO_2/SiO_2的制备及其对茜素红溶液的降解动力学  

Preparation of TiO_2/SiO_2 and kinetics for degradation of alizarin red over TiO_2/SiO_2

作　　者：付文[1] 刘安华[2] 黄军左[1] 

机构地区：[1]茂名学院化工与环境工程学院,广东茂名525000 [2]华南理工大学材料学院,广东广州510640

出　　处：《工业催化》2009年第12期13-16,共4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,采用溶胶-凝胶法制备了TiO2/SiO2复合物。X射线衍射和红外光谱等表征结果表明,纳米TiO2/SiO2粒子焙烧后主要以锐钛型存在,有Ti—O—Si键产生。在实验浓度范围,光催化降解茜素红反应符合一级动力学规律,采用半衰期法确定反应级数为0.82。Nanoparticle TiO2/SiO2 was prepared by sol-gel method using tetraethylorthosilicate and tetrabutylorthotitanate as the precursors and glacial acetic acid as the depressant. XRD and FT-IR results showed that the crystalline phase was anatase with formation radation of alizarin red is in conformity with the first order with half life period of 0.82. of Ti-O-Si bonds. The photocatalytic deg- kinetics in the concentration range involved,

关 键 词：催化化学 纳米TiO2/SiO2 溶胶-凝胶法 茜素红 光催化降解 动力学 

分 类 号：O643.36[理学—物理化学] O643.1[理学—化学]