微波离子热法合成SAPO-5分子筛及其 形貌调控的研究
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O614.121

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Synthesis and morphology tuning of SAPO-5 Molecular Sieve by Microwave-assisted Ionothermal method
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    摘要:

    以丁二酸/癸二酸、氯化胆碱与四乙基溴化铵复配形成的低共熔体作为溶剂和模板剂,借助微波-离子热法合成出了SAPO-5分子筛。系统地考察了晶化温度、前驱物的种类及低共熔混合物的种类等条件对多级孔SAPO-5分子筛形貌的影响。采用X射线衍射(XRD)、扫描电镜(SEM)、N2物理吸脱附等检测手段对合成产物的结构、形貌和孔结构等进行了表征。SEM表明了铝源、磷源对SAPO-5分子筛形貌均有显著的影响。N2物理吸脱附表明部分癸二酸替换丁二酸对SAPO-5分子筛的孔结构影响很大。SEM、N2物理吸脱附分析表明该分子筛是一种同时含有微孔和介孔结构的磷酸铝分子筛。

    Abstract:

    Hierarchical structured SAPO-5 molecular sieve has been ionothermally synthesized by microwave irradiation and using eutectic mixture based on succinic acid/partly succinic acid with sebacic acid, choline chloride and tetraethyl ammonium bromide as solvent and template.The influences of various experimental parameters, such as crystallization time, the types of precursors and the kinds of eutectic mixture have been systematically investigated. The resulting SAPO-5 molecular sieve was characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), and N2 physical adsorption-desorption, respectively. SEM analysis revealed that aluminum and phosphorus sources had great impact on SAPO-5. N2 physisorption measurements confirmed that replacing partly succinic acid with sebacic acid has great impact on the pole structure of SAPO-5. SEM、N2 physical adsorption-desorption characterizations show that the resultant material is one kind of hierarchical structured aluminophosphate molecular sieve possesses both micropore and mesopore.

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问娟娟,赵新红.微波离子热法合成SAPO-5分子筛及其 形貌调控的研究[J].精细化工,2017,34(6):

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  • 收稿日期:2016-08-16
  • 最后修改日期:2016-12-13
  • 录用日期:2017-01-18
  • 在线发布日期: 2017-05-04
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