摘要
采用复合表面活性剂CTAB和P123形成的超分子模板为结构导向剂,以工业硫酸氧钛液为钛源,控制溶液pH值及水解条件调控TiOSO4的水解缩聚及与模板剂的自组装速率,钛水解胶粒通过界面作用形成介孔前驱体,脱模后制得二维六方,比表面积为205.7m2/g,平均孔径为3.28nm的锐钛型有序介孔TiO2.用XRD、HRTEM、SAED及等温N2吸附等对样品进行了表征,初步探讨了介孔的形成过程.钛水解胶粒和复合模板剂通过界面处的静电和氢键等相互作用,协同形成介孔结构,属协同作用机理.
Using composite template （CTAB and P123 ） as structure-directing agents, industrial titanyl sulfate as Ti source, the precursor of mesoporous TiO2 was prepared via controlling the hydrolysis and condensation rate of industrial TiOSO4, self-assembly rate of template and pH value of solution. The as-pre- pared materials were characterized by XRD, HRTEM, SAED and nitrogen adsorption-desorption. Ordered mesoporous anatase titania is obtained after template removal, with hexaganol mesopore, SBET of 205.7m2/g, average pore diameter of 3.28nm. The formatiom process of mesopore belongs to cooperative formation mechanism, i.e. the hydrolysis colloid particles of titanium and composite template interact through static force and hydrogen bond on the interface, cooperating to form mesopore.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第2期225-228,共4页
Journal of Inorganic Materials
基金
国家自然科学基金(50474071)
关键词
有序介孔二氧化钛
硫酸氧钛
复合模板剂
形成机理
ordered mesoporous titania
titanyl sulfate
composite template
formation mechanism
