三维大孔TiO_2光催化剂的制备及其催化性能  

Synthesis and Photocatalytic Activity of Macroporous TiO_2 Photocatalyst with Three-Dimensional Structure

作　　者：徐志兵[1] 郭畅[1] 隆兴兴[1] 唐业仓[2] 魏先文[2] 

机构地区：[1]安庆师范学院化学与环境科学学院,安徽安庆246003 [2]安徽师范大学化学与材料学院,安徽芜湖241000

出　　处：《催化学报》2006年第8期732-736,共5页

摘　　要：以聚甲基丙烯酸甲酯微球为模板,以钛酸正丁酯为原料,采用溶胶-凝胶法制备了具有三维结构的大孔TiO2.采用差示扫描量热、热重-微分热重、X射线衍射、红外光谱、扫描电子显微镜和氮气吸附等手段对样品进行了表征.结果表明,高温热处理后得到的三维大孔TiO2光催化剂的孔径为200 nm左右,孔径分布均匀,TiO2纳米晶粒中锐钛矿相和金红石相的含量分别为82%和18%.光催化氧化实验表明,此种三维结构的TiO2对甲基橙溶液具有较好的光催化氧化性能.The macroporous TiO2 photocatalyst was synthesized using spherical polymethyl methacrylate particles as the template and Ti（OBu）4 as the raw material by the sol-gel method. The samples were characterized by differential scanning calorimetry, thermogravimetry-differential thermogravimetry, scanning electron microscopy, infrared spectroscopy, X-ray diffraction, and N2 adsorption. The characteristic pore structure with about 200 nm spherical voids was obtained after calcination. The contents of anatase and rutile in the TiO2 nanocrystals of the macroporous TiO2 photocatalyst were 82 % and 18 % , respectively. The experiment of photocatalytic degradation of methyl orange showed that the macroporous TiO2 photocatalyst has a high photocatalytic activity.

关 键 词：二氧化钛 聚甲基丙烯酸甲酯 大孔材料 光催化 甲基橙 

分 类 号：O643.32[理学—物理化学]