TiO_2/SiO_2的制备及其对染料X3B溶液降解的光催化活性  

Preparation of TiO_2/SiO_2 and Its Photocatalytic Activity for Degradation of Dye X-3B in Aqueous Solution

作　　者：赵文宽[1] 牛晓宇[2] 贺飞[1] 方佑龄[1] 

机构地区：[1]武汉大学化学系,武汉430072 [2]黑龙江大学化学系,哈尔滨150080

出　　处：《催化学报》2001年第2期171-174,共4页

基　　金：国家自然科学基金!资助项目 ( 2 0 0 73 0 3 0 )

摘　　要：以粗孔球形硅胶为载体 ,以聚乙二醇和二乙醇单乙醚的钛酸四丁酯无水乙醇溶液为浸涂液 ,用涂覆法制备了TiO2 /SiO2 光催化剂 .用XRD ,SEM和UV Vis等对催化剂的物相、形貌及TiO2 负载量进行了表征 ,并通过可溶性染料活性艳红X 3B的降解反应 ,考察了其光催化活性 .实验结果表明 ,当选用 16 .79%TiO2 /SiO2 光催化剂时 ,活性艳红X 3B溶液的脱色率可达TiO2/SiO2 thin film was prepared by repeating the following procedure, first dipping porous round silica gel in Ti-solution of tetrabutyl titanium ethanol containing polyethylene glycol and diethylene glycol monoethylether, then calcinating at 600 degreesC for 2 h. The crystal phase, the morphology, and the TiO2 amount on the beads were determined by XRD, SEM, and UV-Vis, respectively. The photocatalytic activity of TiO2/SiO2 thin film with different TiO2 loadings was evaluated by degradation of dye X-3B in aqueous solution. In comparison of TiO2 /SiO2 containing omega (TiO2) = 54.02% with that containing omega (TiO2) = 16.79%, the former has larger average particle diameter and had undergone some phase transformation from anatase to rutile, but no phase transformation had been observed for the latter. Furthermore, with 16.79%-TiO2/SiO2 as a catalyst, the degradation of dye X-3B in aqueous solution with O-2 flow had a decolorization ratio up to 93% in 1 h.

关 键 词：二氧化钛 硅胶 光催化活性 染料活性艳红X-3B 光催化降解 光催化剂 

分 类 号：O643[理学—物理化学] O644[理学—化学]