【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135.9m2/g,孔隙率31%,孔容0.17cm3/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。更多还原

【Abstract】 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-prepared 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 135.9m²/g and mesoporous pore diameter was uniform with a value of 2.2nm,the porosity of 31% and the pore volume of 0.17cm³/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.更多还原