SBA-15的二氧化钛改性及其光催化降解对氯苯酚  

Modification of SBA-15 with Titania and Photodegradation of 4-Chlorophenol

作　　者：席红安[1] 方能虎[1] 李中凯[1] 张言波[1] 路庆华[1] 印杰[1] 朱子康[1] 

机构地区：[1]上海交通大学化学化工学院,上海200240

出　　处：《化学学报》2002年第12期2124-2128,共5页Acta Chimica Sinica

基　　金：上海市纳米专项基金(No.0 12 3NM0 0 8)资助项目

摘　　要：用 后合成'法在介孔二氧化硅SBA 15的孔壁表面键接了二氧化钛,并对其结构进行了表征.改性后的SBA 15保持了规则的介孔结构,并在孔壁表面形成了类似于锐钛型二氧化钛的Ti—O—Ti网络结构.光催化降解对氯苯酚的结果表明,经过两次二氧化钛键接的样品表现出较高的光催化效率.但是由于对酚、醌等中间产物的强烈吸附以及孔道中反应物质的扩散速度慢。Titania incorporated SBA-15 was prepared by 'post-synthesis', and characterized by X-ray fluorescence, X-ray diffraction, FT-Raman, and nitrogen adsorption-desorption analyses. The modified SBA-15 maintained ordered mesoporous structures, with titania grafted on the pore surface to form a type of Ti-O-Ti network like that of anatase. The titania doubly grafted SBA-15 exhibited higher activity on photocatalyzed degradation of 4-chlorophenol than the singly grafted one. However, its photocatalysis efficiency was a little lower than pure anatase due to its high adsorption of the intermediate products of 4-chlorophenol during photodegradation and the poor reactants transfer in pores.

关 键 词：光催化降解 SBA-15 二氧化钛 改性 对氯苯酚 水 有机污染物 

分 类 号：O643.3[理学—物理化学]