一步法直接合成有机季铵功能修饰的介孔分子筛SBA-15  

Direct Synthesis of Mesoporous SBA-15 Functionalized with Quaternary Ammonium Organic Group

作　　者：周丽绘[1] 张利中[2] 胡军[1] 赵秀阁[2] 刘洪来[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室化学系,上海200237 [2]华东理工大学分析测试中心,上海200237

出　　处：《物理化学学报》2007年第4期620-624,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20236010;20490200);上海市科委(05DJ14002)资助项目

摘　　要：以P123嵌段共聚物为模板剂,3-三甲基丙基氯化铵三甲氧基硅烷(TMAPS)为修饰剂,酸性条件下一步法直接合成了有机季铵基团功能修饰的SBA-15,并通过XRD、TEM、N_2吸附-脱附、Raman光谱等对功能化样品的结构和性质进行了表征,对一步法合成TMAPS修饰的SBA-15的可能反应机理进行了探讨.修饰后的SBA-15仍然保持了二维六方特征介孔结构,随着TMAPS负载量的增大,SBA-15孔道有序度下降,孔径、孔容和比表面积也随之下降.有机季铵基团在SBA-15孔道表面均匀分散,可与HAuCl_4通过快速离子交换制备Au颗粒高度分散的Au-SBA-15.The functionalized SBA-15 with quaternary ammonium organic group was directly synthesized in acid conditions by using nonionic triblock P123 as template, N-trimethoxysilylpropyl-N,N,N-trimethylammonium chloride （TMAPS） as modifying agent. By means of XRD, TEM, N2 adsorption-desorption and Raman spectroscopy, the structure and properties of the functionalized SBA-15 were characterized. The results indicated that the regular hexagonal structural character was retained after the functionalization. With increasing of amounts of TMAPS, the BET surface area, pore size, and pore volume of functionalized SBA-15 were decreased. Moreover, Au-SBA-15 had been successfully prepared by ion exchage of TMAPS groups uniformly distributed in the channel of functionalized SBA-15 with HAuCl4.

关 键 词：SBA-15 TMAPS 一步法合成 功能修饰 Au—SBA-15 

分 类 号：O643.36[理学—物理化学]