锐钛矿型TiO_2纳米颗粒的水热法合成及其特性  

Anatase TiO_2 Nanoparticles Synthesized Using the Hydrothermal Method and its Character

作　　者：傅小明[1] 徐艳[1] 杨在志[1] 刘照文[1] 

机构地区：[1]宿迁学院三系,江苏宿迁223800

出　　处：《钢铁钒钛》2011年第2期1-4,共4页Iron Steel Vanadium Titanium

基　　金：宿迁学院高级人才启动基金(SQCGJ2010002);江苏省大学生实践创新训练计划项目(2010SSJ02);宿迁市指导性科技计划项目(ZD2010010)

摘　　要：以硫酸钛为钛源,浓氨水为沉淀剂,通过水热法水解合成TiO2。利用XRD、SEM和TEM对试样进行分析,结果表明:当硫酸钛溶液水解时不加入浓氨水,随着水解时间的延长,获得的锐钛矿型TiO2颗粒的粒径没有明显的变化;当硫酸钛溶液水解时加入浓氨水,合成锐钛矿型TiO2颗粒的粒径明显变小,在240℃、48.0 h和pH=9.0条件下水热法合成了方形或者近椭圆形的TiO2,分散性较好,其颗粒粒径约为20 nm。对不同条件下水热法合成的TiO2进行UV-VIS分析,其锐钛矿型TiO2颗粒粒径的变小有利于TiO2吸收峰的蓝移。Anatase TiO2 nanoparticles are synthesized with Ti（SO4）2 as titanium source and stronger ammonia water as precipitant using the hydrothernal method.The samples are characterized by XRD,SEM and TEM.The results showed that the change of size of anatase TiO2 particles is not obvious with increase of the reaction time when stronger ammonia water is not joined Ti（SO4）2 solution.Anatase TiO2 particles become small markedly under the same conditions when stronger ammonia water is joined Ti（SO4）2 solution.Anatase TiO2 particles of about 20 nm are obtained with pH=9.0 at 240 ℃for 48.0 h by the hydrothernal method.The samples are characterized with UV-VIS.The decrease of TiO2 particles is propitious to the blue shift of the absorption peak of TiO2.

关 键 词：纳米TIO2 水热法 硫酸钛 氨水 蓝移 

分 类 号：TB383.1[一般工业技术—材料科学与工程]