苯基改性的中孔分子筛SBA-15的合成及其磺化  

Synthesis and Sulfonation of Phenyl-Modified SBA-15 Mesoporous Molecular Sieve

作　　者：皇艳蕾[1] 陈杨英[2] 刘秀梅[2] 周丹红[1] 范荫恒[1] 

机构地区：[1]辽宁师范大学化学化工学院,辽宁大连116029 [2]中国科学院大连化学物理研究所催化基础国家重点实验室,辽宁大连116023

出　　处：《催化学报》2004年第5期413-416,共4页

基　　金：宁省教育厅高校基金 (2 0 2 12 2 0 2 5 );国家自然科学基金 (90 2 0 60 3 6)资助项目

摘　　要：在酸性条件下用正硅酸乙酯 (TEOS)和苯基三乙氧基硅 (PTES)直接缩合制备了苯基改性的中孔分子筛Ph SBA 15 ,并用紫外光谱、红外光谱、X射线衍射、透射电镜和核磁共振等对改性后的样品进行了表征 .结果表明 ,在 30 0℃下焙烧后 ,模板剂被脱除 ,而苯基可完整保留 ,苯基改性的SBA 15分子筛具有有序结构 .进一步用氯磺酸磺化改性后 ,可得到苯磺酸化的分子筛 ,其酸度可达 4 19mmol/g.The phenyl-modified SBA-15 (Ph-SBA-15) mesoporous molecular sieve was synthesized by one-step synthesis method involving co-condensation of tetraethoxysilane (TEOS) and phenyltriethoxysilane (PTES) in the presence of a poly(alkylene oxide) block copolymer PEO 20PPO 70PEO 20(P123) under acidic condition. When the sample was calcined at 300 ℃ for 10 h, the phenyl groups were still stable and the template P123 was completely removed. After sulfonation, the sulfonic groups were introduced into the Ph-SBA-15 molecular sieve. The structure and properties of the phenyl-modified mesoporous molecular sieve and the sulphonated product (HSO 3-Ph-SBA-15) were characterized by XRD, TEM, MAS NMR, IR and UV-Vis techniques. The Ph-SBA-15 and HSO 3-Ph-SBA-15 featured well-ordered hexagonal arrays of mesopores and the pore channels were similar to those in pure SBA-15. The HSO 3-Ph-SBA-15 behaved as the mesopores, with very homogeneous pore diameter of 5 7 nm. The introduced phenyl groups can be determined based on the absorption peaks in IR and UV-Vis spectra. The phenyl groups were stably connected in the silicon-wall, and the other organic compounds such as the template P123 were completely removed from the molecular sieve. The acid content was 4 19 mmol/g in HSO 3-Ph-SBA-15, whereas no acidity could be tested in pure SBA-15.

关 键 词：中孔分子筛 SBA-15 苯改性 磺化 

分 类 号：O643[理学—物理化学]