工业TiOSO_4液合成有序介孔TiO_2分子筛的研究  

Synthesis of ordered mesoporous titania from industrial TiOSO_4

作　　者：田从学[1] 张昭[1] 何菁萍[1] 

机构地区：[1]四川大学化工学院

出　　处：《功能材料》2006年第1期63-65,69,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50474071)

摘　　要：以工业TiOSO4液为原料，在复合模板剂十二胺和十六烷基三甲基溴化铵（CTAB）的超分子自组装诱导作用下，合成出有序介孔TiO2。通过控制溶液pH值有效调控TiOSO4液的水解缩聚速率，使得水合二氧化钛均匀沉积于复合模板剂形成的胶束上，在脱除模板剂后得到介孔材料。产物采用XRD、粒度分布测试、SEM、TEM、电子衍射及等温N2吸附进行分析表征。研究表明：介孔TiO2具有精细纳米结构，孔道分布窄，平均孔径2．2nm，BET比表面积为135．9m^2／g，孔隙率31％，孔容0．17cm^2／g；介孔TiO2的孔壁部分晶化为锐钛型，晶粒尺寸为37nm，粒子介于30～80nm间，聚集的粉末颗粒为类球形。On a composite surfactant template （N-DA and CTAB）, ordered mesoporous TiO2 was synthesized via a supra-molecular self-assembly route from industrial TiOSO4. Hydrolysis and polycondensation reaction of anqueous TiOSO4 solution was gradually generated on the micelle of composite surfactant template through controlling the pH value, and the ordered mesoporous structure was obtained after template removed. The as-repared powder was characterized by XRD, particle size distribution test, SEM, TEM, ED and N2 absorption and desorption methods. The results indicate that the ordered mesoporous TiO2 has fine nanostructure, with a narrow pore size distribution, it has surface area of 135.9m^2/g and mesoporous pore diameter was uniform with a value of 2. 2nm, the porosity of 31% and the pore volume of 0. 17cm^3/g. The pore wall was partially crystallized with an anatase phase with the crystal size of 37nm and the grain size arranges from 30-80nm, and they display analogous spherical particles as a result of congregation.

关 键 词：工业TiOSO4 有序介孔TiO2 复合模板合成 精细纳米结构 

分 类 号：O614.41[理学—无机化学] TQ424.25[理学—化学]