摘要
用水热法合成了磷酸锌铝分子筛的纯相和单晶,并测定了其组成和晶胞参数,对其红外光谱、核磁共振、电子探针、扫描电镜、吸附性能、表面酸性、热稳定性进行了研究。实验结果表明,由于锌进人骨架同晶取代了部分铝使ZAPO-5分子筛有了B酸酸性,但使骨架的热稳定性有所降低。
The pure zinc aluminophosphate molecular sieve ZAPO-5 and its sinlge crystals were synthesized.The chemical composition and parameters of the unite cell of ZAPO-5 were determined. The zinc aluminophosphate molecular sieve ZAPO-5 was investigated by means of scanning electron microscopy, X-ray diffraction, infrared spectra, ^(8.1)P-magic-angle spinning nuclear magnetic resonance, electron probe energy dispersion analysis. The adsorption properties, thermal stability and surface acidity of ZAPO-5 were investigated. The results showed that isomorphous replacemnt of aluminium in one tetrahedral unite by zinc makes the framework carry one negative charge but it has been balanced by H^+. Therefore ZAPO-5 exhibits the property of Bronsted acid, whereas the thermal stability drops a little.
出处
《吉林大学自然科学学报》
CAS
CSCD
1989年第1期104-108,共5页
Acta Scientiarum Naturalium Universitatis Jilinensis
基金
国家自然科学基金
关键词
磷酸锌铝
分子筛
合成
性能
单晶
zinc aluminophosphate, molecular sieve synthesis, property.
