模板剂的用量对SAPO-5分子筛微球大小和形貌的影响

Effect of the dosage of the template on the size and morphology of SAPO-5 molecular sieve microsphere

在高压微波条件下制备了具有特殊表面结构的SAPO-5分子筛微球，研究了模板剂用量对分子筛微球表面大小及形貌的影响，通过X射线衍射（XRD）、扫描电镜（SEM）进行了表征．实验结果表明，模板剂对分子筛微球的合成具有结构导向作用，且模板剂的用量对分子筛微球的聚集状态影响很大，模板剂的用量比在2．00～2．60范围时，生成由粒径为5μm左右的大粒径SAPO-5分子筛的晶体；当模板剂的用量减少到1．12～1．30时，生成由粒径为2～3μmSAPO-5分子筛小颗粒组成的18-25μm微球．

SAPO-5 molecular sieve microspheres were rapidly prepared using microwave irradiation with high pressure. The effect of the dosase of template on the size and morphology of SAPO-5 molecular sieve microspheres has been studied. The resulting samples were characterized with X-ray diffraction spectroscopy （XRD） and scanning electron microscopy （SEM）. The results show that template has the structure-directed action for the synthesis of SAPO-5 molecular sieve microspheres and the dosage of template greatly affects the assembling behaviors of SAPO-5 molecular sieve microspheres. When the dosage is much more, the crystal of SAPO-5 molecular sieve is formed. When the dosage reduces to the range of 1.12- 1.30, the SAPO-5 microspheres made of SAPO-5 molecular sieve crystal in small size were obtained.