溶胶-凝胶法合成硅溶胶包覆型均分散纳米β分子筛  

Sol-Gel Synthesis of Nano-zeolite β/Silicon Sol Composite

作　　者：冯锡兰[1] 柳云骐[1] 刘晨光[1] 

机构地区：[1]中国石油大学(华东),重质油国家重点实验室,CNPC催化重点实验室,青岛266555

出　　处：《无机化学学报》2008年第11期1846-1851,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家重点基础研究发展规划“973”项目(No.2004CB217807);山东省自然科学基础项目(No.Y2007B35)资助

摘　　要：在系统考察铝源、反应体系硅铝比、钠离子、反应温度等对分子筛粒度影响的基础上,优化合成条件合成出了粒径为100nm左右的β分子筛。利用XRD和TEM对所合成样品进行了表征。采用溶胶凝胶法研究了硅溶胶包覆的均分散纳米β分子筛复合材料的合成,结果表明合成产物为纳米β分子筛均匀分散于硅溶胶基质中的微孔-介孔双孔复合材料。The effect of SiO2/Al2O3 ratio（w/w）, sodium ion and crystallizing temperature on the zeolite size was investigated. Pure and highly crystalline zeolite beta at a size about 100 nm was synthesized by hydrothermal method and characterized by XRD and TEM. The colloidal properties of zeolite nanocrystals and silicon sol were studied and then nano-sized composites of zeolite beta/silicon sol was synthesized by the sol-gel method. The TEM and low temperature nitrogen adsorption-desorption results show that the nanocrystals of zeolite beta are finely dispersed on the surface of silicon oxide, and the sample is meso-microporous composite.

关 键 词：溶胶-凝胶法 Β分子筛 复合材料 

分 类 号：O643.3[理学—物理化学]