高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (3): 721.

• 研究论文 • 上一篇    下一篇

AM-6分子筛的快速合成及原子线形成机理研究

郭美玲1,2,范峰滔1,郭强1,2,冯兆池1,李灿1   

  1. 1. 中国科学院大连化学物理研究所, 催化基础国家重点实验室, 大连 116023;
    2. 中国科学院研究生院, 北京 100049
  • 收稿日期:2010-10-12 修回日期:2010-11-23 出版日期:2011-03-10 发布日期:2011-02-23
  • 通讯作者: 李灿;冯兆池 E-mail:canli@dicp.ac.cn;zcfeng@dicp.ac.cn
  • 基金资助:

    国家“九七三”计划项目(批准号: 2009CB623507)和国家自然科学基金(批准号: 20773118, 21003122)资助.

UV Raman Spectroscopic Studies on Rapid Synthesis of AM-6 Zeolite and Formation Mechanism of —V—O—V— Atomic Wires

GUO Mei-Ling1,2, FAN Feng-Tao1, GUO Qiang1,2, FENG Zhao-Chi1*, LI Can1*   

  1. 1. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2010-10-12 Revised:2010-11-23 Online:2011-03-10 Published:2011-02-23
  • Contact: LI Can;FENG Zhao-Chi E-mail:canli@dicp.ac.cn;zcfeng@dicp.ac.cn
  • Supported by:

    国家“九七三”计划项目(批准号: 2009CB623507)和国家自然科学基金(批准号: 20773118, 21003122)资助.

摘要: 本文报道了4小时快速合成AM-6分子筛的方法,为目前文献报道最短的合成时间,考察了K+含量、起始凝胶的碱度对AM-6分子筛纯度以及晶化度的影响. 结果表明,K+可以抑制杂相的生成,在K+/V4+=3以及pH=12.5时制备的样品为纯相且晶化度最高. 结合紫外可见吸收光谱和紫外拉曼光谱研究了AM-6分子筛中-V-O-V-原子线的形成过程,结果表明合成早期形成的由VO4四面体共角相连形成的VO3-的链状结构是形成AM-6分子筛中-V-O-V-原子线的重要中间物种.  

关键词: AM-6分子筛, 紫外拉曼, 合成机理, 原子线

Abstract: The synthesis of AM-6 zeolite with remarkable short time, 4 hours, has been reported in this work. The effects of the K+/V4+ ratio and the pH value of the initial gel on the purity and crystallinity of AM-6 zeolite have been investigated. The synthesis condition optimized at K+/V4+=3 and pH=12.5. The formation mechanism of the –V-O-V- atomic wires in AM-6 is monitored by UV Raman spectroscopy in combination with UV-Vis spectroscopy and X-ray diffraction patterns. It turns out that the formation of the VO3- chains composed of corner-sharing VO4 in the silicate gel plays an important role in the formation of -V-O-V- atomic wires in AM-6 crystals.

Key words: AM-6 zeolite, UV Raman spectroscopy, synthesis mechanism, atomic wires

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