高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (1): 21.doi: 10.7503/cjcu20200201

所属专题: 分子筛功能材料 2021年,42卷,第1期

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硅铝沸石分子筛晶化过程再思考

吴勤明, 王叶青, 孟祥举, 肖丰收()   

  1. 浙江大学化学系, 杭州 310028
  • 收稿日期:2020-04-14 出版日期:2021-01-10 发布日期:2021-01-12
  • 通讯作者: 肖丰收 E-mail:fsxiao@zju.edu.cn
  • 基金资助:
    国家自然科学基金(批准号(21720102001);91634201, 21703203)资助

Reconsideration of Crystallization Process for Aluminosilicate Zeolites

WU Qinming, WANG Yeqing, MENG Xiangju, XIAO Fengshou()   

  1. Department of Chemistry,Zhejiang University,Hangzhou 320028,China
  • Received:2020-04-14 Online:2021-01-10 Published:2021-01-12
  • Contact: XIAO Fengshou E-mail:fsxiao@zju.edu.cn
  • Supported by:
    ? Supported by the National Natural Science Foundation of China(21720102001)

摘要:

目前针对沸石分子筛的晶化过程已经进行了大量研究, 但是近年来硅铝分子筛的合成显示其晶化过程超出了传统的沸石分子筛晶化理论, 特别表现在硅铝沸石分子筛的模板作用、 水的作用以及沸石晶体之间的转化等. 本文讨论了上述作用的本质, 并通过研究模板法作用提出了无有机模板法合成硅铝沸石的策略, 通过了解水的作用提出了无溶剂法合成沸石分子筛, 通过表征沸石之间的转化过程发现不仅低骨架密度可以向高骨架密度晶体转化, 而且高骨架密度也可以向低骨架密度晶体转化.

关键词: 硅铝沸石, 沸石晶化过程, 模板作用, 水热合成

Abstract:

Despite great efforts have been performed for a long time since 1950s’, new achievements for zeolite synthesis in recent years give many examples to overstep the traditional theory for zeolite crystallization, in particular to the template effect, water role, zeolite building units, and crystal transformation in the aluminosilicate zeolites. In this review, authors systemically discuss the essence of the aforementioned factors. By investigation of template effect, it is suggested a new strategy for organotemplate-free synthesis of aluminosilicate zeolites; through understanding the role of water in the zeolite synthesis, it is designed solvent-free synthesis of zeolites; observed by crystal transformation of zeolites, it is proposed that both low to high framework density and high to low framework density could be realized.

Key words: Aluminosilicate zeolites, Zeolite crystallization process, Template effect, Hydrothermal synthesis

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