文献类型：期刊文献

英文题名：Synthesis of Al-MCM-41 with high content of framework aluminum

作者：Wan, Y; Wang, Z; Ma, JX; Jin, XM; Zhou, W

机构：[1]E China Univ Sci & Technol, Inst Ind Catalysis, Shanghai 200237, Peoples R China

年份：2002

卷号：60

期号：1

起止页码：71

外文期刊名：ACTA CHIMICA SINICA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000173368700014)】；

语种：英文

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

摘要：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 Al-27 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.