以异丙胺为结构导向剂合成ZSM-5纳米棒  

Synthesis of ZSM-5 nanorod using isopropylamine as a structure-directing agent

作　　者：王振东[1] 郑玉婷[1] 方向青[1] 刘月明[1] 

机构地区：[1]上海市绿色化学与化工过程绿色化重点实验室,华东师范大学化学系,上海200062

出　　处：《工业催化》2010年第9期23-26,共4页Industrial Catalysis

基　　金：国家重点基础研究发展计划(863计划)(2007AA03Z342);国家自然科学基金(20973064);上海市重点学科建设项目资助(B409)

摘　　要：以异丙胺为结构导向剂既可以合成ZSM-23分子筛,也可以合成ZSM-5分子筛。在水玻璃-硫酸铝-浓硫酸-水-异丙胺体系中,存在ZSM-23与ZSM-5两种分子筛的晶相竞争,可以通过调变体系中异丙胺和碱量实现对最终产品晶相的控制,在低硅铝比和高碱量条件下成功制备了ZSM-5分子筛。XRD、SEM及N_2吸脱附测试结果表明,所得样品为棒状纳米ZSM-5分子筛,具有高结晶度和大的外表面积。Isopropylamine（IPA） as a structure-directing agent could be used to synthesize both ZSM-23 and ZSM-5 molecular sieves. In the synthesis system of water glass-aluminum sulfate-IPA-eoncentrated sulfuric aeid-H2O, ZSM-23 and ZSM-5 molecular sieves both could be synthesized. By studying the competitive templating effect of IPA and OH- , ZSM-5 nanorod was prepared by hydrothermal crystallization under the condition of low molar ratio of silica to alumina and high alkali dosage. The characterization results of XRD, SEM and N2 adsorption-desorption showed that the as-synthesized ZSM-5 molecular sieves were nanosized rod-shaped crystals with high crystallinity and large external surface area.

关 键 词：催化化学 ZSM-5分子筛 ZSM-23分子筛 纳米棒 异丙胺 

分 类 号：O643.36[理学—物理化学] TQ426.6[理学—化学]