高等学校化学学报

高等学校化学学报 ›› 2006, Vol. 27 ›› Issue (3): 538.

• 研究论文 • 上一篇    下一篇

无铝V-β分子筛的合成、表征及催化性能研究

喻铃1,何红运1,何驰剑1,朱华元1,文建军1,庞文琴2   

  1. 1. 湖南师范大学化学化工学院,长沙 410081
    2. 吉林大学无机合成与制备化学国家重点实验室,长春 130012  
  • 收稿日期:2005-03-09 出版日期:2006-03-10 发布日期:2006-03-10
  • 通讯作者: 何红运(1956年出生),男,教授,从事无机合成与烟火剂制备研究. E-mail: hhy1956@163.com
  • 基金资助:

    湖南省自然科学基金(批准号： 04JJ40011)和吉林大学无机合成与制备化学国家重点实验室基金资助.

Synthesis,Characterization and Catalytic Behavior of V-Si-β Molecular Sieves

YU Ling1, HE Hong-Yun1*,HE Chi-Jian1,ZHU Hua-Yuan1,WEN Jian-Jun1, PANG Wen-Qin2   

  1. 1. College of Chemistry and Chemical Engineering,Hunan Normal University,Changsha 410081,China;
    2. State Key Laboratory of Inorganic Synthesis & Preparative Chemistry,Jilin University,Changchun 130012,China
  • Received:2005-03-09 Online:2006-03-10 Published:2006-03-10

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摘要：

采用水热晶化法在SiO2-V2O5-(TEA)2O-NH4F-H2O体系中合成了无铝V-β分子筛,运用XRD,IR,UV-Vis漫反射,TG/DTA和SEM等技术表征了样品的物理化学特性,证明样品具有BEA拓扑结构,结晶良好,且钒原子进入了分子筛骨架. 探讨了反应混合物组成对V-β分子筛晶化的影响,在以H2O2为氧化剂的苯酚羟基化反应中,考察了V-β分子筛的催化氧化性能.

关键词: V-β分子筛； 催化性能； 苯酚； 羟基化

Abstract:

V-β molecular sieves through isomorphous replacement of Si by V in zeolite β were successfully synthesized via hydrothermal procedure. The synthesis conditions were as follows: the molar chemical composition of the mixture: 60SiO2-xV2O5-y(TEA)2O-zH2O-wNH4F ( 1≤x≤6,y≥16,500≤z≤800,w≥5 ),reaction temperature 413 K,reaction time 12 d. The synthesized samples are characterized by XRD,IR,UV-Vis,TG,DTA and SEM. The results confirm that V-β molecular sieves contain a β phase of good species,and show the presence of V iron in the framework position. In the system the catalytic behavior of V-β molecular sieves in the hydroxylation of phenol with H2O2 as the oxidant was also investigated.

Key words: V-β molecular sieve; Catalytic behavior; Phenol; Hydroxylation

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