高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (2): 186.

• 论文 • 上一篇    下一篇

晶化温度对中孔分子筛(M41S)结构转变的影响

陈晓银, 丁国忠, 陈海鹰, 李全芝   

  1. 复旦大学化学系, 上海, 200433
  • 收稿日期:1996-01-30 出版日期:1997-02-24 发布日期:1997-02-24
  • 通讯作者: 李全芝
  • 作者简介:陈晓银, 男, 33岁, 博士后.
  • 基金资助:

    国家自然科学基金;中国博士后科学基金

Effect of Crystallization Temperature on Structural Transformations of Mesoporous Molecular Sieve M41S Materials

CHEN Xiao-Yin, DING Guo-Zhong, CHEN Hai-Ying, LI QuanAnZhi   

  1. Department of Chemistry, Fudan University, Shanghai, 200433
  • Received:1996-01-30 Online:1997-02-24 Published:1997-02-24

摘要: 在低表面活性剂浓度及低表面活性剂与氧化硅比的条件下,研究了十六烷基三甲基溴化铵一硅酸钠体系中晶化温度对中孔分子筛M41S材料结构转变的影响.结果表明,晶化温度提高至135℃改变了原六方晶相MCM-41的结构,晶化温度提高至150℃后,中孔结构由六万MCM-41晶格转变为热不稳定的层状相,使得M41S材料的热稳定性降低,进一步提高晶化温度至165℃,中孔M41S材料则转变成微孔沸石ZSM-5.

关键词: 中孔M41S材料, ZSM-5沸石, 结构转变

Abstract: The effect of crystallization temperature on the structural transformations of mesoporous molecular sieve M41Smaterials was described for the cetyltrimethylammoniumsilicate system at a low surfactant/silica ratio and a low surfactant concentration.With increasing crystallization temperature to 135 ℃,the texture of originally formed hexagonal MCM-41 is changed.When crystallization temperature increases to 150℃, the thermal stability of M41Smaterials is decreased due to the transformation of mesoporous structure from hexagonal MCM-41 lattice to thermally unstable lamellar phase.Further increasing crystallization temperature to or above 165℃, the microporous ZSM-5 type zeolite instead of mesoporous M41Smaterials is formed in the same synthetic system, resulting from the structural transformation of M41Sto ZSM-5.

Key words: Mesoporous M41S materials, ZSMm-5 zeolite, Structural transformation

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