纳米二氧化钛胶体和粉体的制备  

Study on Preparation of Nanonsized Titania Colloid and Powders

作　　者：毛日华[1] 孔之瑾[1] 郭存济[1] 

机构地区：[1]上海大学材料科学与工程学院,上海201800

出　　处：《上海大学学报（自然科学版）》1999年第6期477-480,共4页Journal of Shanghai University:Natural Science Edition

摘　　要：采用醇盐的乙醇溶液,在70 ℃下水解与结晶分步进行,制备了纳米锐钛矿相二氧化钛胶体及粉体.以XRD、BET、TEM、HREM、TG-DTA、光子相关光谱(PCS)等方法对胶体及粉体进行了表征.光子相关光谱分析表明胶体极为稳定;高分辨透射电子显微镜分析表明所得胶体中二氧化钛晶形发育完整,220 ℃处理后粒子平均粒径为9nm ,比表面积171 m 2/g.Nanonsized anatase titania colloid and powders were prepared by hydrolysis of titanium tetrabutoxide in basic media and then dehydrated at 70℃ in acid media. The powder and colloid were characterized by XRD, BET, TEM, HREM, TG DTA, PCS(photon correlation spectroscopy) methods. It was found that the titania particles in colloid were already crystallite with anatase crystal lattice after being dehydrated in acid media. The average diameter of titania nanonpowder after calcination at 220 ℃ is 9 nm and the specific surface area is 171 m 2/g.

关 键 词：二氧化钛 纳米粉 胶体 锐钛矿 催化剂 制备 

分 类 号：TF123.3[冶金工程—粉末冶金] O643.36[冶金工程—冶金物理化学]