高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (3): 353.

• 研究论文 • 上一篇    下一篇

合成条件对无铝Fe-β沸石分子筛晶化的影响

何红运1,2, 庞文琴1, 刘午阳3, 邓凤3   

  1. 1. 吉林大学无机合成与制备化学国家重点实验室, 长春 130023;
    2. 湖南师范大学化学化工学院, 长沙 410006;
    3. 中国科学院武汉波谱与原子分子物理国家重点实验室, 武汉 430071
  • 收稿日期:2001-06-13 出版日期:2002-03-24 发布日期:2002-03-24
  • 通讯作者: 庞文琴(1931年出生),女,教授,博士生导师,从事无机合成化学研究.
  • 基金资助:

    国家重点基础研究发展规划项目(批准号:G2000077507);中国科学院武汉波谱与原子分子物理国家重点实验室基金(批准号:7152012);吉林大学无机合成与制备化学国家重点实验室基金资助

Influence of the Synthesis Condition on the Crystallization of Fe-β Zeolite Molecular Sieves in the Absence of Aluminum

HE Hong-Yun1,2, PANG Wen-Qin1, LIU Wu-Yang3, DENG Feng3   

  1. 1. State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, Jilin University, Changchun 130023, China;
    2. The Institute of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410006, China;
    3. State Key Laboratory of Nuclear Magnetic Resonance, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2001-06-13 Online:2002-03-24 Published:2002-03-24

摘要: 利用水热晶化法合成了无铝Fe-β沸石,对初始凝胶中不同硅源、n(SiO2)/n(Fe2O3),n(Na2O)/n(SiO2),n[(TEA)2O]/n(SiO2)以及n(H2O)/n(SiO2)对晶化速率和晶粒大小的影响进行了讨论,表征并测定了产物的n(Si)/n(Fe)比.结果表明,合成的Fe-β沸石晶粒均匀,Fe存在于沸石骨架中,由于Fe的掺入,引起Fe-β红外光谱、差热分析曲线及晶胞参数等发生变化.

关键词: Fe-&beta, 沸石, 水热合成, 晶胞参数, 沸石分子筛

Abstract: Crystalline Fe-β zeolite molecular sieves have been hydrothermally synthesized. Crystallization rate and average crystal size of Fe-β zeolites have been investigated as a function of n (SiO2)/ n (Fe2O3),n(Na2O)/ n (SiO2) and n [(TEA)2O]/ n (SiO2) ratios in the initial gel by using two silica sources. The iron content and structural characteristics of products have been determined by means of X-ray diffraction, IRspectra, DTA/TGA, SEM, NMR and ICP. The results show that the crystal sizes of Fe-β zeolites are uniform. The DTA curve of Fe-β, IRspectra and unit cell parameters of the resulting Fe-β zeolites were obviously changed due to the incorporation of iron atoms into the framework.

Key words: Fe-&beta, zeolite, Hydrothermal synthesis, Unit cell parameters, Zeolite molecular sieves

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