MCM-48分子筛的合成、XRD的表征及^(129)Xe核磁共振的研究  

Synthesis of mesoporous molecular sieve MCM-48、X-ray diffraction and^(129)Xe NMR

作　　者：孙克宁[1] 张乃庆[1] 曹莹[1] 邵延文[2] 

机构地区：[1]哈尔滨工业大学理学院,黑龙江哈尔滨150001 [2]黑龙江大学分析测试中心,黑龙江哈尔滨150086

出　　处：《哈尔滨工业大学学报》2002年第2期194-196,共3页Journal of Harbin Institute of Technology

基　　金：教育部留学回国人员基金资助课题 ( 9880 90 10 1)

摘　　要：用水热法合成了MCM - 48,并研究了MCM - 48分子筛结构 ,通过X射线衍射和12 9Xe核磁共振研究了其空间结构 ,确定了MCM - 48为Ia3d空间群的立体结构 .经过 5 6 0℃烧后的MCM - 48分子筛 ,空间群结构仍未改变 .与一维的MCM - 41分子筛比较 ,MCM - 48分子筛的核磁共振化学位移有两个峰 ,而且位移小 ,说明MCM - 48是立体结构 ,而且孔径也大于MCM - 41.A cubic member of mesoporous molecular sieve M41S family with a three dimension structure was denoted as MCM-48. A cubic symmetry with an Ia3dspace group was determined by X-ray powder diffraction(XRD)for the as -synthesized and calcined MCM-48 material. The pore structure was unaffected by the local change of structure .The chemical shift in 129 Xe NMR Spectroscopy of adsorbed Xenon indicates that the MCM-48 is a cubic symmetry compared with MCM-41, one-dimensional pore channels. The pore of MCM-48 is bigger than that of MCM-41.

关 键 词：MCM-48分子筛 合成 XRD ^129Xe核磁共振 X射线衍射 结构 孔径 

分 类 号：TQ424.25[化学工程]