以硫酸钛为前驱体的简单溶胶-凝胶法合成纳米多孔二氧化钛粉末  

Simple Sol-Gel Route for Preparation of Nanosized Porous TiO_2 Powders Using Inorganic Precursor

作　　者：张新[1] 吴俊升[2] 肖葵[2] 周建龙[2] 杨仁春[3] 李晓刚[2] 

机构地区：[1]环境保护部核与辐射安全中心,北京100082 [2]北京科技大学新材料技术研究院,北京100083 [3]安徽工程大学生物与化学工程学院,安徽芜湖241000

出　　处：《科技导报》2012年第27期58-60,共3页Science & Technology Review

基　　金：国家高技术研究发展计划(863计划)项目(2006AA05Z306)

摘　　要：以无机硫酸钛溶液为前驱体,甲酰胺为pH值调节剂,本文采用简单溶胶-凝胶法合成纳米多孔的TiO2粉末。运用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)和氮吸附脱附(N2 Adsorption/Desorption)等方法对合成的TiO2粉末进行了表征。结果表明,合成的TiO2粉末具有高的热稳定性,450—750℃的温度范围内焙烧后为单一的锐钛矿相结构,且850℃焙烧后主要相为锐钛矿相。随着焙烧温度的升高,TiO2粉末的晶粒长大,比表面积减少。550℃焙烧后的TiO2粉末是由平均晶粒尺寸约为10nm的颗粒聚集而成,其比表面积约为219.70m2·g-1,并且具有独特的双孔结构。The nanosized porous TiO2 powders were synthesized by using the titanium sulfate solution through a simple sol-gel route, where the formamide was used as the pH adjusting agent. The X-ray diffraction, the scanning electron microscopy, the transmission electron microscopy and the N2 Adsorption/Desorption were used to analyze the prepared samples. The results show that the prepared TiO2 powders have a high thermal stability and maintain as a monophasic anatase in cases of calcination from 450℃ to 750℃, furthermore, the main crystalline phase remains as that of anatase even at 850℃. The crystalline grains of TiO2 powders grow larger and the specific surface area is reduced with enhancing the calcination temperature. The microstructure of TiO2 powders is that of aggregation of nanocrystalline with diameter of approximately 10 nm in case of calcination at 550℃. The specific surface area of the prepared samples is approximately 219.70m2.g-1 after calcinating at 550℃ and there is a specific bimodal pore structure in the prepared samples.

关 键 词：TIO2 多孔 溶胶-凝胶 无机前驱体 

分 类 号：TB383.1[一般工业技术—材料科学与工程]