Zeolitization of diatomite to prepare hierarchical porous zeolite materials through a vapor-phase transport process

Yajun Wang; Yi Tang; Angang Dong; Xingdong Wang; Nan Ren; Zi Gao

doi:10.1039/B201113A

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Yajun Wang,^a Yi Tang,*^a Angang Dong,^a Xingdong Wang,^a Nan Ren^a and Zi Gao^a

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* Corresponding authors

^a Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
E-mail: ytang@fudan.ac.cn

Abstract

In this study, we report a new, simple approach to the preparation of hierarchical structured zeolites through transforming the diatomaceous silica into zeolite by a vapor-phase transport (VPT) method. The morphology and macro-porosity of the diatomite are well preserved even in the samples with zeolite content higher than 50%. The products possess high mechanical strength and hydrothermal stability, and are thus promising for application in catalysis, adsorption and separation. The influence of the zeolite structures, the amount of adsorbed seeds, and the VPT treatment time and temperature on the crystallinity of the resulting materials are discussed. Powder XRD, SEM, TEM, IR and N₂ adsorption–desorption measurements are employed to monitor the VPT treatment process.

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Article information

DOI: https://doi.org/10.1039/B201113A
Article type: Paper
Submitted: 31 Jan 2002
Accepted: 28 Mar 2002
First published: 16 Apr 2002

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J. Mater. Chem., 2002,12, 1812-1818

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