液相反应制备纳米锐钛矿相二氧化钛  

Preparation of Nanosized Anatase Titania

作　　者：毛日华[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：《无机材料学报》2000年第4期761-764,共4页Journal of Inorganic Materials

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等方法对胶体及粉体进行了表征．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 １７１ｍ~２／ｇ．Nanosized anatase titania colloid and powders were prepared by hydrolysis of titaniumtetrabutoxide in basic media and then dehydrated at 700C in acid media. The powder and colloid were characterized by XRD、 BET、 TEM、 HREM and TG-DTA methods. The results show that after dehydrated in acid media the titania particles in colloid are already anatase crystallites with good crystal lattices. The average diameter of the nanosized titania powder after calcination at 220℃ is 9nm and surface area is 171m^2/g.

关 键 词：二氧化钛 纳米 胶体 锐钛矿 液相反应 

分 类 号：TQ134.11[化学工程—无机化工] TF123[冶金工程—粉末冶金]