三乙胺对微波水热合成SAPO-5分子筛微球的影响  

Synthesis of SAPO-5 molecular sieve microspheres through microwave hydrothermal method and it's formation mechanism

作　　者：高俊萍[1,2] 路丽华[2] 陈亚芍[1] 董涛[1] 王太山[1] 

机构地区：[1]应用表面与胶体化学教育部重点实验室陕西师范大学化学与材料科学学院,陕西西安710062 [2]第四军医大学药学系,陕西西安710032

出　　处：《陕西师范大学学报（自然科学版）》2011年第5期51-54,66,共5页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：陕西省科技攻关计划项目(2006k06-G9)

摘　　要：以三乙胺(TEA)为模板剂,利用微波水热合成技术制备了具有特殊表面结构的SAPO-5分子筛微球和分散态的SAPO-5分子筛微晶,考察了模板剂用量对合成SAPO-5分子筛微球大小及形貌的影响;利用X射线衍射、扫描电镜对所合成分子筛的结晶度及晶体形貌进行了表征.实验结果表明,模板剂用量较大时,生成分散态SAPO-5分子筛微晶,微晶呈六棱柱状,结晶度高;用量较少时,生成由不同粒径大小微晶组成的不同表面形貌的SAPO-5分子筛微球.研究认为,模板剂TEA不仅作为SAPO-5分子筛合成的结构导向剂(SDA),同时也具有控制分子筛微球分级结构形貌的作用,模板剂的用量是控制分子筛聚集状态及分子筛微球形貌的主要因素.SAPO-5 molecular sieve microspheres and its microcrystal were synthesized with TEA as template using microwave hydrothermal technique.Influence of the template on the shape and surface structure of SAPO-5 molecular sieve was investigated.The molecular sieves were characterized with X-ray diffraction spectroscopy（XRD） and scanning electron microscopy（SEM）.The results showed that the SAPO-5 molecular sieve had AFI-type crystalline structure,high crystallinity and six prism microcrystal,and the microspheres composed of SAPO-5 microcrystals possess high crystallinity and good integrity.The dosage of TEA greatly affected the surface structure and the assembling behaviors of SAPO-5 molecular sieve.In presence of high dosage of TEA,the SAPO-5 molecular sieve microcrystals were formed.Under the low dosage of TEA,the SAPO-5 molecular sieve microspheres with integrity surface could be obtained.The proposed formation mechanism indicates that TEA acts not only as structure-directed agent（SDA） for the synthesis of SAPO-5 molecular sieve but also as the control agent for formation of microspheres with hierarchical structure.

关 键 词：SAPO-5分子筛 微波水热合成 SAPO-5微球 

分 类 号：O69[理学—化学] O643