高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (1): 1.

• 论文 •    下一篇

导向剂法合成β沸石的晶化机制研究

周群1, 裘式纶2, 庞文琴2   

  1. 1. 苏州大学化学化工学院, 苏州 215006;
    2. 吉林大学化学系, 长春 130023
  • 收稿日期:1999-03-08 出版日期:2000-01-24 发布日期:2000-01-24
  • 通讯作者: 周　群(1965年出生),女,博士,讲师,从事无机合成研究.
  • 基金资助:

    国家教育部吉林大学无机合成与制备化学开放研究实验室资助

Studies on the Crystallization Mechanism of β Zeolite Synthesized with Nucleation Gel

ZHOU Qun1, QIU Shi-Lun2, PANG Wen-Qin2   

  1. 1. Department of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215006, China;
    2. Department of Chemistry, Jilin University, Changchun 130023, China
  • Received:1999-03-08 Online:2000-01-24 Published:2000-01-24

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摘要： 采用导向剂法合成了β沸石.在导向剂中存在β沸石微晶核,晶化过程中β沸石只能在一个较窄的硅铝比范围内形成;模板剂TEAOH仅存在于β沸石微晶核中.在β沸石合成过程中,水合钠离子不仅起着平衡沸石骨架负电荷的作用,并且在β沸石的晶体生长过程中起到一定程度的结构导向作用.

关键词: 导向剂, &beta, 沸石, IR光谱, TGA-7热重分析

Abstract: Zeolite β was synthesized with a nucleation gel. The IR spectroscopic characterizations confirm the existence of the microcrystal nuclei in the nucleation gel. Chemical analysis of solid and liquid phases demonstrates that zeolite β can grow within a relatively narrow n(Si)/n(Al) ratio range. TGA analysis reveals that TEAOH only exists in the microcrystal nuclei formed in the nucleation gel. It was also found that the negative charges of the zeolite framework are actually balanced by the hydrated Na+ ions, which may direct the growth of zeolite β during the crystallization process.

Key words: Nucleation gel, Zeolite β, IR spectroscopy, TGA-7 analysis

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