介孔型硅柱撑蒙脱石的制备及表征  

Preparation and Characterization of Mesoporous Silica-pillared Montmorillonite

作　　者：张爱琴[1,2] 张荣斌[1] 张宁[1] 洪三国[1] 

机构地区：[1]南昌大学化学系,南昌330031 [2]南昌航空大学环化学院,南昌330036

出　　处：《非金属矿》2009年第6期37-38,56,共3页Non-Metallic Mines

基　　金：国家自然科学基金(20763005/B030301)

摘　　要：利用溶剂化作用,将辛胺和正硅酸四乙酯同时插层进入十六烷基三甲基有机阳离子型蒙脱石层间,在辛胺的碱性催化作用下,正硅酸四乙酯在蒙脱石层间原位水解得到硅酸及有机物混合插层蒙脱石。将此混合插层化合物在550℃煅烧后得到硅柱撑蒙脱石。用TG-DTA、XRD、TEM和N2吸附-脱附等技术对所制备的硅柱撑蒙脱石进行了表征。结果表明:蒙脱石经硅柱撑后其比表面积由原始的80m2/g增大到667m2/g,孔容达到0.7413cm3/g,具有介孔结构。Silica-pillared montmorillonite with microporous and mesoporous pores was prepared by interlamellar hydrolysis of tetraethyl orthosilicate catalyzed by n-octylamine after solvation of n-octylamine and tetraethyl orthosilicate with cetyl trimethylammonium in the interlayers of montmorillonite. The characteristics of pillared clay were examined by TG-DTA, XRD, SEM, TEM and N2 adsorption-desorption methods. Results indicated that the specific surface area and pore volume were all increased obviously compared with the original clay： the specific surface area was enlarged from 80m^2/g to 667m^2/g, the pore volume of silica-pillared clay was 0.7413cm^3/g,

关 键 词：蒙脱石 柱撑 表征 介孔 

分 类 号：TD97[矿业工程—选矿]