模板剂的用量对SAPO-5分子筛微球大小和形貌的影响-陕西师范大学学报期刊社网站

陕西师范大学学报（自然科学版）

专题研究

模板剂的用量对SAPO-5分子筛微球大小和形貌的影响

高俊萍，董涛，王集杰，王太山，陈亚芍

(陕西省大分子科学重点实验室，陕西师范大学化学材料科学学院，陕西西安 710062)

高俊萍，女，硕士，主要从事催化材料合成方面的研究．

摘要:

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5 μm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2～3 μmSAPO-5分子筛小颗粒组成的18～25 μm微球．

关键词：

SAPO-5分子筛；高压；微波合成；模板剂；微球

收稿日期：

2006-03-15

中图分类号：

O643

文献标识码：

文章编号：

1672-4291(2006)04-0073-04

基金项目：

西安市科技攻关资助项目（GG04155）

Doi:

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

GAO Jun-ping, DONG Tao, WANG Ji-jie, WANG Tai-shan, CHEN Ya-shao*

(Key Laboratory for Macromolecule Science of Shaanxi Province, College of Chemistry and Materials Science, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)

Abstract:

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.

KeyWords:

SAPO-5 molecular sieve; High pressure; Microwave synthesis; Template; Microsphere