TiO_2微球的水热法制备及其形成机理  

Preparation of TiO_2 microspheres via hydrothermal synthesis and their formation mechanism

作　　者：刘献明[1,2] 尹卫东[1,2] 苗少斌[1,2] 

机构地区：[1]洛阳师范学院化学化工学院,洛阳471022 [2]河南

出　　处：《化工中间体》2011年第4期26-28,共3页

摘　　要：本文以硫酸钛为原料,尿素作沉淀剂,采用水热合成法制备了锐钛矿型纳米TiO_2微球。用XRD、TEM、SEM等测试手段对所制备粉体的物相组成、形貌等进行了分析。结果表明,所制备的球形粉体为锐钛型纳米TiO_2,球形直径分布在1-3μm之间,而且进一步发现这些球形颗粒是由直径为10-20nm的纳米颗粒自组装而成的。最后,对微球TiO_2的形成机理进行了探讨。By using Ti(SO_4)_2 as the precursor and urea as the precipititating agent,TiO_2 microspheres were prepared by hydrothermal synthesis.The grain size,phase composition and morphology of the products arc characterization by XRD,TEM and SEM.The results showed that the resultant powders are anatase TiO_2,the morphology of the products exhibits spherical and the diameter ranges from 1 to 3μm.Further observations from SEM indicated that these microspherical particles were self-assembled by nanometer TiO_2 with the diameter of 10-20 nm.Finally,the formation mechanism of TiO_2 microspheres was investigated.

关 键 词：二氧化钛 微球 水热法 聚乙二醇 

分 类 号：TB3[一般工业技术—材料科学与工程]