应用化学 ›› 2010, Vol. 27 ›› Issue (06): 695-699.DOI: 10.3724/SP.J.1095.2010.90558

• 研究论文 • 上一篇    下一篇

敞开体系法合成W-MCM-41介孔催化剂及其性能

张晓丽,杨春艳,李敏艳,王向宇,郑修成*   

  1. (郑州大学化学系 郑州 450001)
  • 收稿日期:2009-08-26 修回日期:2009-10-30 出版日期:2010-06-10 发布日期:2010-06-10
  • 通讯作者: 郑修成,男,副教授; E-mail:zhxch@zzu.edu.cn; 研究方向:纳米介孔材料,多相催化
  • 基金资助:
    郑州大学引进人才专项基金和郑州大学创新基金(2007CXSY045)资助项目

Preparation and Property of W-MCM41 Mesoporous Catalysts in an Open System

ZHANG Xiao-Li, YANG Chun-Yan, LI Min-Yan, WANG Xiang-Yu, ZHENG Xiu-Cheng*   

  1. (Department of Chemistry,Zhengzhou University,Zhengzhou 450052)
  • Received:2009-08-26 Revised:2009-10-30 Published:2010-06-10 Online:2010-06-10

摘要:

以十六烷基三甲基溴化铵为模板剂、正硅酸乙酯为硅源、钨酸钠为钨源,采用敞开体系法制备了W-MCM-41介孔催化剂样品。利用多种表征手段对其进行了表征,考察了投料中硅钨摩尔比对W-MCM-41结构和催化环己烯氧化性能的影响。研究发现,所制W-MCM-41介孔催化剂样品均保持着MCM-41的介孔结构,而且表现出较好的催化性能;随着硅钨摩尔比的减小,样品晶胞参数和晶面间距逐渐增大,而硅钨摩尔比为30时所制的W-MCM-41样品催化活性最高。

关键词: 敞开体系法, W-MCM-41, 硅钨摩尔比, 结构表征, 环己烯氧化

Abstract:

W-MCM-41 mesoporous catalysts were successfully synthesized in an open system with tetraethyl orthosilicate(TEOS) as silica precursor, sodium tungstate as tungsten precursor, and cetyltrimethylammonium bromide(CTAB) as structuredirecting reagent. The samples were characterized by means of various techniques and their catalytic properties for the oxidation of cyclohexene were studied. The effects of Si/W molar ratios on the structure and catalytic properties were investigated in details. The results show that the prepared samples retained the ordered mesoporous structure of MCM-41 and exhibited high catalytic properties. The sample synthesized with n(Si)/n(W)=30 exhibited better catalytic property than others.

Key words: open synthesis system, W-MCM-41, Si/W molar ratio, structure characterization, cyclohexene oxidation

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