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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

镧系金属掺杂MCM-41分子筛的合成与表征

胡冰; 施剑林; 陈航榕   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室 上海 200050
  • 收稿日期:2003-03-17 修回日期:2003-04-08 出版日期:2004-03-20 网络出版日期:2004-03-20

Synthesis and Characterization of Lanthanide-Containing MCM-41 Molecular Sieves

HU Bing; SHI Jian-Lin; CHEN Hang-Rong   

  1. State Key Laboratory of High Performance Ceramics and Superfine Microstructrue; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2003-03-17 Revised:2003-04-08 Published:2004-03-20 Online:2004-03-20

PDF (PC)

958

被引次数

37

摘要： 采用溶胶-凝胶法制备并分析了掺杂铈、钕、铕、铒的MCM-41介孔材料,运用XRD、HRTEM、EDS和BET等方法考察了镧系金属元素掺杂对MCM-41结构的影响.研究结果表明,镧系金属元素掺杂到了MCM-41试样的骨架结构中.由于材料结构中的一部分Si4+被Ln3+所取代,介孔材料的有序孔道d值随着掺杂镧系离子半径的减小而降低,随着镧系元素掺杂量的增加而上升.

关键词: 镧系金属元素, MCM-41, 掺杂

Abstract: MCM-41 mesoporous materials doped with Cerium, Neodymium, Europium and Erbium were synthesized by
hydrothermal methods. Powder X-ray diffraction (XRD), N2 sorption and high resolution transmission electron microscopy-X-ray energy dispersive
spectroscopy techniques (HRTEM-EDX) were used to investigate the effects of Lanthanides to the structure of MCM-41. Results show that Lanthanides
have been incorporated into the framework and/or walls of the silica matrix. The ordering of the mesoporous structure is dependent
on the doping content and ionic diameters of Lanthanides. An increase in the content of Ln leads to the increase in the average pore diameter and
a decrease in the diameter of Ln leads to the decrease in the average pore diameter.

Key words: Lanthanides, MCM-41, incorporation

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