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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (1): 141-144. 上一篇    下一篇

研究简报

含钛CDS-1分子筛的水热合成与表征

吴蕾蕾，刘月明*，吴鹏，何鸣元   

  1. (华东师范大学化学系 上海市绿色化学与化工过程绿色化重点实验室 上海 200062)
  • 投稿日期:2007-04-06 修回日期:2007-08-21 发布日期:2008-01-14
  • 通讯作者: 刘月明

Hydrothermal Synthesis and Characterization of CDS-1 Type Titanosilicate

WU Lei-Lei LIU Yue-Ming* WU Peng HE Ming-Yuan   

  1. (Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, Shanghai 200062)
  • Received:2007-04-06 Revised:2007-08-21 Published:2008-01-14
  • Contact: LIU Yue-Ming

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以钛酸正丁酯（TBOT）为钛源、以发烟硅胶为硅源、以四甲基氢氧化铵（TMAOH）为模板剂，采用了一步法直接水热合成了CDO晶体结构的含钛分子筛，Ti-CDS-1。用粉末X-射线衍射、电子扫描、紫外可见漫反射光谱，傅立叶变换红外光谱等手段对所合成的样品进行了表征，结果表明，Ti-CDS-1维持原来全硅分子筛的片状晶体外形；原料中钛原子大部分嵌入到CDS-1分子筛分子筛骨架，少量钛在分子筛表面形成八面体非骨架钛物种，这部分骨架外钛可以用酸处理选择性去除。

关键词: Ti-CDS-1, 层状分子筛, 合成, 表征

A novel titanosilicate with the CDO structure, Ti-CDS-1, has been hydrothermally synthesized by using tetrabutylorthotitante (TBOT) as a Ti source, fumed silica as a Si source, and tetramethylammonium hydroxide (TMAOH) as a template. The samples were characterized by various techniques such as XRD, SEM, UV-visible and FT-IR spectroscopies. Ti-CDS-1 showed a morphology of thin plate crystals comparable to siliceous CDS-1. Ti-CDS-1 contained Ti species mainly in the framework in addition to a small part of octahedral extraframework Ti on exterior crystal surfaces. The extraframework Ti species could be removed selectively by acid treatment.

Key words: Ti-CDS-1, lamellar zeolite, hydrothermal synthesis, characterization