均相沉淀-发泡法制备纳米氧化钛及其表征分析  

Preparation of Nano-sized Titanium Oxide by Homogeneous Precipitation-frothing Method and Characterization

作　　者：孙家跃[1] 肖昂[1] 夏志国[1] 杜海燕[1] 

机构地区：[1]北京工商大学化学与环境工程学院,北京100037

出　　处：《化学世界》2005年第8期449-452,457,共5页Chemical World

基　　金：国家自然科学基金(20476002);北京市自然科学基金(2042007)资助项目。

摘　　要：采用Ti(SO4)2和尿素为原料,利用均相沉淀-发泡工艺制备出了纳米氧化钛粉体材料,并用DTA-TG、XRD、IR和FS等方法对样品进行了表征.DTA-TG结果表明TiO2样品在高温固相反应期间有两个明显的失重台阶.XRD分析表明,在500℃下焙烧的TiO2样品为相纯度较高的锐钛矿型氧化钛粉体,其平均粒径约为12.834 nm.IR谱图显示随着烧结温度的升高,450～800cm-1处Ti-O键的伸缩振动峰出现分裂,且峰形逐渐锐化,表明纳米样品的尺寸有所增大.FS分析表明在365nm激发波长下,600℃煅烧下生成的混合晶型的纳米氧化钛具有最强受激发射峰,而在393 nm激发光下,500℃煅烧下生成的锐钛矿型氧化钛具有最强受激发射峰.Nano-sized titanium oxide powders were prepared from Ti （SO4）2 and urea by homogeneous precipitationfrothing method DTA-TG, XRD, IR and FS were used in characterizing the products. DTA-TG showed that there were two obvious steps of weight loss upon heating of TiO2 XRD showed that the powder calcined at 500℃ was pure anatase phase titanium oxide with an average particle size of 12.834 nm. IR indicated that the flat and broad band in the region 450 - 800 cm^-1 would narrow with an increase of particle size caused by incressing the calcining temperature. The FS result revealed that the anatase/rutile titanium oxide calcined at 600℃ had the strongest emission peak excitated by 365 nm and the anatase titanium oxide calcined at 500℃ had the strongest emission peak excitated by 393 nm.

关 键 词：纳米氧化钛 均相沉淀 发泡技术 

分 类 号：TQ134.1[化学工程—无机化工] O612.4[理学—无机化学]