正辛胺模板法制备Si/Al复合空心微球及其结构表征  

Preparation and Characterization of Si/Al Composite Hollow Microspheres by Octylamine Templating

作　　者：王吉会[1] 董青[1] 李英[1] 

机构地区：[1]天津大学材料科学与工程学院,天津300072

出　　处：《材料工程》2008年第10期5-9,共5页Journal of Materials Engineering

基　　金：天津市应用基础研究计划面上基金资助项目(06YFJMJC02500)

摘　　要：以正辛胺为模板、正硅酸乙酯（TEOS）为硅源、异丙醇铝为铝源，在盐酸的催化作用下通过溶胶一凝胶方法制备出圆形度和分散性好、结构完整的Si／Al复合空心微球。分析了不同反应时间和反应温度下Si／Al复合空心微球的形貌、粒径、成分和结构。结果表明：Si／Al复合空心微球的平均粒径随反应温度和反应时间的增加而缓慢增大，但明显小于同样条件SiO2空心微球的粒径。Si／Al复合空心微球的平均粒径为8～16μm、壳层厚度为2．18～3．61μm。Si／Al复合空心微球中的铝主要以氧化物的形式存在；壳层表面具有微孔结构，比表面积为431～912m3／g；可几孔径为1．2～2．0nm。Si/Al composite oxide hollow microspheres were prepared by sol-gel route and using oetyl- amine vesicles as core template, TEOS as silica source, aluminum isopropylate as aluminum source and hydrochloric acid as catalyst. The surface morphology, mean diameter, shell thickness and struc- ture of Si/Al composite oxide hollow microspheres under different reaction time and temperature were examined and determined. The results showed that the mean diameter of Si/Al composite hollow microspheres increased with the promotion of reaction temperature and prolongation of reaction time, but was smaller than that of silica hollow microspheres under the same preparation condition. The as- synthesized Si/Al composite hollow mierosphere had a mean diameter of 8-16μm, shell thickness of 2.18-3.61μm, specific surface area of 431-912 m2/g and microporous structures with pore diameter around 1.2-2.0nm. The aluminum species in Si/Al composite oxide hollow microspheres was mostly in the form of alumina.

关 键 词：空心微球 Si/A1复合氧化物 正辛胺模板 表征 

分 类 号：TB383[一般工业技术—材料科学与工程]