摘要：利用聚氧乙烯-聚氧丙烯-聚氧乙烯三嵌段共聚物(P123)作为结构导向剂,用氯化钾调控材料的形貌,以1,3,5-三甲苯(TMB)为分子筛的扩孔剂,钛酸正丁酯和四氯化钛作为不同的钛源,原位一步法合成出Ti-SBA-15分子筛。在高温煅烧除去模板剂之后,利用X射线衍射、紫外-可见漫反射光谱、红外光谱、扫描电镜以及N₂吸附-脱附曲线对合成的介孔材料进行表征。结果表明:合成的介孔钛硅材料具有有序的孔道结构,钛在SBA-15的孔道内,钛在硅中的分散好。以钛酸丁酯为钛源合成的Ti-SBA-15呈规则的球形,平均直径为3.0μm;四氯化钛为钛源合成的Ti-SBA-15没有规则的形状,大小也不均一。

关键词： 钛酸正丁酯;四氯化钛;介孔材料;原位合成

Abstract： Titanium substituted SBA -15 mesoporous materials were prepared by direct approach under conventional hydrothermal conditions. Using P123 （EO₂₀PO₇₀EO₂₀） as a template and KCl for controlling material morphology， Ti-SBA-15 was prepared by titanic chloride and tetrabutyl titanate as the precursor for titanium source respectively. The template was removed by calcinations and the synthesized materials were characterized by X-ray diffraction， UV-Vis spectrometer， nitrogen adsorption-desorption， scanning electron microscope etc. The experimental results showed that the mesoporous materials were ordered， and titanium was tetrahedral and highly dispersed through the inside of SBA-15. The spherical mesoporous particles with average particle size of 4.3 μm were synthesized by tetrabutyl titanate as the precursor for titanium. The mesoporous materials synthesized by TiCl₄ as the precursor for titanium appeared irregular shape and sizes. 

Keywords： tetrabutyl titanate； titanic chloride； mesoporous materials； in-situ synthesis