基于C8H15N2Br为结构导向剂合成磷酸铝分子筛材料

摘要

Aluminum phosphate molecular sieve with open frame structure was synthesized by ionothermal method using isopropanol aluminum as aluminum source, phosphoric acid as phosphorus source, morpholine as additive and 1-butyl-3-methyl imidazole salt bromine C8H15N2Br as structure-directing agent. The influences of various experimental parameters, such as P2O5/Al2O3, HF/Al2O3, C4H9NO/Al2O3, C8H15N2Br/Al2O3 on the synthesis reaction were systematically investigated. The aluminum phosphate molecular sieve with open frame structure was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), scanning electron microscope (SEM) and thermogravimetry-differential thermal analysis (TG-DTA), respectively. XRD analysis revealed that optimum condition for synthesizing open framework aluminum phosphate material is Al2O3: P2O5: HF: C4H9NO: C8H15N2Br =1.0:2.0 (1.02.0) : 4.0:4.0. SEM measurement confirmed that the synthesized aluminum phosphate material has the regular rectangular crystal morphology.%以异丙醇铝作为铝源、磷酸作为磷源、吗啉为助剂和1-丁基-3-甲基咪唑溴盐(C8H15N2Br)为结构导向剂,采用离子热法合成开放骨架的磷酸铝分子筛,系统考察了P2O5/Al2O3摩尔比、HF/Al2O3摩尔比、吗啉/Al2O3摩尔比和C8H15N2Br/Al2O3摩尔比对磷酸铝分子筛合成的影响,通过X射线衍射(XRD)、扫描电镜(SEM)和TG-DTA等检测方法对所合成的产物的结构、形貌进行了表征.XRD分析结果表明:开放骨架磷酸铝材料合成的最佳条件为Al2O3:P2O5:HF:C4H9NO:C8H15N2Br=1.0:2.0:(1.0-2.0):4.0:4.0,SEM分析结果表明所合成的磷酸铝材料为具有规则的长方体晶体形貌.