Synthesis and Characterization of New Type GaPO4 Molecular Sieves

Abstract

Abstract: Two kinds of new type gallopbosphate molecular sieves were synthesized by using dipropy-lamine (DPA) and diethylamine (DEA) as the templates.One is named GaPO₄-C, and the other GaPO₄-O.GaPO₄-C belongs to the cubic system with the parameter of unit cell α=1.1948(2) nm.GaPO₄-Obelongs to orthorhombic system with the parameters of unit cell α=2.1192(4) nm, b=0.9738(5) nm, c=0.9225(5) nm.By using IRanalysis, it was found that there is Ga-OHbond in GaPO₄-Oframework and not any in GaPO₄-C.After 450℃ calcinating, the framework of GaPO₄-Cis partly collapsed and the framework of GaPO₄-Ois wholly collapsed.The adsorption experiment of the samples after calcinating indicates that the secondary pore formed in the framework of the samples.The pore size of the secondary pore-fermed by GaPO₄-Cis between 0.43-0.60 nm.The pore size of the secondary pore formed by GaPO₄-Ois bigger than 0.6 nm.

Key words: Gallophosphate, Synthesis, Characterization

TrendMD:

LIU Zhen-Yi, LI You-Shi . Synthesis and Characterization of New Type GaPO₄ Molecular Sieves[J]. Chem. J. Chinese Universities, 1993, 14(4): 462.

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Synthesis and Characterization of New Type GaPO₄ Molecular Sieves

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