Studies on the Synthesis, Structure and Properties of Zinc Silicoaluminophosphate Molecular Sieve

Abstract

Abstract: The pure zinc silicoaluminophosphate molecular sieve (ZnAPSO-5) was synthesized in the presence diethylaminoethanol as a template by hydrothermal crystallization.The chemical composition and parameters of the unit cell of ZnAPSO-5 were determined.The structure of ZnAPSO-5 has been studied by means of X-ray diffraction analysis, scanning electron microscopy, infrared spectra, X-ray photoelectron spectroscopy (XPS).The thermal stability and surface acidity of ZnAPSO-5 were investigated.The results showed that the atoms of zinc and silicon entered into the framework of ZnAP-SO- 5 molecular sieve and that isomorphous replacements of aluminium by zinc and phosphorus by silicon make the framework carry negative charge but it has been balanced by H+.Therefore, ZnAPSO-5 exhibits the property of Bronsted acid.

Key words: Molecular sieve, Aluminophosphate, Zinc, Silicon

TrendMD:

HAN Shu-Yun, CHE Zhi-Yan . Studies on the Synthesis, Structure and Properties of Zinc Silicoaluminophosphate Molecular Sieve[J]. Chem. J. Chinese Universities, 1993, 14(7): 893.

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Studies on the Synthesis, Structure and Properties of Zinc Silicoaluminophosphate Molecular Sieve

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