文献类型：期刊文献

中文题名：高骨架铝含量Al-MCM-41的合成

英文题名：Synthesis of Al-MCM-41 with High Content of Framework Aluminum

作者：万 颖[1];王 正[1];马建新[1];金杏妹[1];周 伟[1]

机构：[1]华东理工大学工业催化研究所,上海200237

年份：2002

卷号：60

期号：1

起止页码：71

中文期刊名：化学学报

外文期刊名：Acta Chimica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金："跨世纪优秀人才培养计划"项目;教育部重点科技基金(No.93039)资助项目.

语种：中文

中文关键词：Al-MCM-41;骨架铝;合成;孔结构;中孔材料;MCM-41;分子筛;氮气;吸附等温线;催化剂

外文关键词：Al-MCM-41; framework aluminum; synthesis

摘要：制备了不同Al含量的Al-MCM-41试样,其中Si/Al比值最小为3,即最高含铝量xAl=0.303.X射线粉末衍射（XPD）分析表明样品具有MCM-41的特征结构,氮气吸附研究表明,样品呈现Ⅳ型吸附等温线,具有孔径分布均一的中孔结构.文中还利用27Al MAS NMR研究了试样中Al的化学环境,结果表明,即使在高铝含量的情况下,样品中的铝原子仍以四配位结合在MCM-41的硅骨架上,未能检测出骨架外六配位铝的存在.文中还就Al含量对孔结构的影响以及Al-MCM-41形成机理作了讨论.
Mesoporous molecular sieves MCM-41 with incorporated structural aluminum (Al-MCM-41) of different Si/Al ratios (ranging from 3 to 100) were prepared using a modified hydrothermal method. Characterization using X-ray powder diffraction and nitrogen adsorption measurement showed that all these samples had typical XRD diffractogram of MCM-41, the adsorption isotherm of type IV and an uniform pore size distribution. The last feature reflects a highly ordered structure of pore arrays. Solid state (27)Al MAS NMR investigation showed further that even at high level of aluminum (x(Al) = 0.303), the Al atoms could still be incorporated tetrahedrally in the MCM-41 structure. Based on the experimental results, the effects of aluminium content on the pore structure and the formation mechanism of Al-MCM-41 were discussed.