离子热法合成多级孔CuAPO-5分子筛

采用丁二酸、氯化胆碱与四乙基溴化铵三元低共熔体为溶剂和模板剂,借助微波辐射快速合成了具有多级孔结构的CuAPO-5分子筛。系统地考察了P2O5/Al2O3、HF/Al2O3与Cu O/Al2O3的物质量之比,铝源及铜源对CuAPO-5分子筛合成的影响。利用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)和N2物理吸脱附等检测手段对合成产物的结晶度、形貌和孔结构等进行了表征。通过SEM可知在一定的条件下,可得到具有六角纳米盘状特殊形貌的CuAPO-5分子筛。N2物理吸脱附、SEM和TEM分析表明该分子筛是一种同时存在微孔和介孔的多级孔磷酸铝分子筛材料。

Ionothermal Synthesis of Hierarchical Structured CuAPO-5 Molecular Sieve

Hierarchical structured CuAPO-5 molecular sieve has been ionothermally synthesized by microwave irradiation and using eutectic mixture based on succinic acid, choline chloride and tetraethyl ammonium bromide as solvent and template. The effects of the ratio of P₂O₅/Al₂O₃, HF/Al₂O₃ and CuO/Al₂O₃, aluminum and copper sources on the crystallization of CuAPO-5 were systematically investigated. The resulting CuAPO-5 molecular sieve was characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), Transmission electron microscopy (TEM), and N₂ physical adsorption-desorption, respectively. SEM analysis reveals that CuAPO-5 molecular sieve with hexagonal nanometer-disc morphology can be synthesized under specific synthesis conditions. N₂ physisorption, SEM and TEM characterizations show that the resultant material is one kind of hierarchical structured aluminophosphate molecular sieve possesses both micropore and mesopore.