工业硫酸氧钛合成有序介孔TiO2及其机理研究

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.

Synthesis of Ordered Mesoporous TiO2 from Industrial Titanyl Sulfate Solution and its Formation Mechanism

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 prepared materials were characterized by XRD, HRTEM, SAED and nitrogen adsorption desorption.Ordered mesoporous anatase titania is obtained after template removal, with hexaganol mesopore, S_BET 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.