Issue 28, 2008
From the journal:

Journal of Materials Chemistry

Hollow zeolite structures formed by crystallization in crosslinked polyacrylamide hydrogels

Li Han,ab   Jianfeng Yao,a   Dan Li,a   Jenny Ho,a   Xinyi Zhang,a   Chun-Hua (Charlie) Kong,c   Zhi-Min Zong,b   Xian-Yong Wei*b  and  Huanting Wang*a  

* Corresponding authors

a Department of Chemical Engineering, Monash University, Clayton, VIC, Australia
E-mail: huanting.wang@eng.monash.edu.au
Fax: +61-3-9905-5686
Tel: +61-3-9905-3449

b School of Chemical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, China
E-mail: wei_xianyong@163.com

c Electron Microscope Unit, University of New South Wales, Sydney, NSW, Australia

Abstract

Hollow zeolite structures including sodalite spheres and hollow zeolite NaA crystals were synthesized by introducing crosslinked polyacrylamide (C-PAM) hydrogels into zeolite synthesis gels. The synthesis gels with weight compositions of 0.8SiO2 : 1.0Al2O3 : 21.2Na2O : 86.0H2O : 7.4–28.7 acrylamide (AM) were used to produce hollow sodalite spheres. The synthesized hollow sodalite spheres had diameters of 1–5 μm and shell thicknesses of 0.5–1 μm, and the sphere diameters decreased from 5–10 μm to 1–3 μm as the amount of C-PAM increased. Hollow zeolite A crystals with sizes of 300–500 nm were grown from the synthesis gel with a weight ratio of 0.8SiO2 : 1.0Al2O3 : 2.6Na2O : 16.4H2O : 2.6–3.8AM. The experimental results suggest that the formation of hollow zeolite structures may involve a surface-to-core crystallization process induced by crosslinked polyacrylamide networks.

Graphical abstract: Hollow zeolite structures formed by crystallization in crosslinked polyacrylamide hydrogels

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Article information

DOI
https://doi.org/10.1039/B805133J
Article type
Paper
Submitted
27 Mar 2008
Accepted
16 May 2008
First published
17 Jun 2008

J. Mater. Chem., 2008,18, 3337-3341

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Hollow zeolite structures formed by crystallization in crosslinked polyacrylamide hydrogels

L. Han, J. Yao, D. Li, J. Ho, X. Zhang, C. (. Kong, Z. Zong, X. Wei and H. Wang, J. Mater. Chem., 2008, 18, 3337 DOI: 10.1039/B805133J

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