锐钛矿型TiO_2/SiO_2复合氧化物的制备  

Preparation and Characterization of TiO_2/SiO_2 Composites

作　　者：苑美荣[1] 任素霞[1] 郭玉鹏[1] 赵旭[1] 刘艳华[1] 

机构地区：[1]吉林大学化学学院,长春130021

出　　处：《吉林大学学报（理学版）》2007年第5期857-860,共4页Journal of Jilin University:Science Edition

基　　金：吉林大学博硕科研启动基金(批准号:420010302323)

摘　　要：以硅灰石为硅源、硫酸钛为钛源,在未添加任何表面活性剂的制备条件下得到较高比表面积的多孔锐钛矿型TiO2/SiO2复合氧化物.反应过程中生成微溶于水的CaSO4,在复合物孔隙的形成中起重要作用.利用XRD,TEM,N2吸附和脱附对复合物的微观结构和化学组成进行了表征.ZiO2-SiO2 composites with large specific surface areas （ up to 308.6 m^2/g） were synthesized from wollastonite and titanium sulfate in the absence of any surfactants under finely tuned several experimental conditions. Calcium sulphate, as a faintly soluble substance in water, plays an important role in the formation of pores in the nanocomposites. The microstructure and chemical composition of nanocomposites were characterized by means of X-ray diffractometry, transmission electron microscopy and N2 adsorption and desorption analysis. The as-prepared titanium dioxide-silicon dioxide nanocomposites with high specific surface areas and well-crystallized anatase contents could be used as an efficient photocatalyst.

关 键 词：二氧化钛 二氧化硅 硅灰石 多孔 硫酸钙 

分 类 号：O614.1[理学—无机化学]