Hollow zeolite structures formed by crystallization in crosslinked polyacrylamide hydrogels

被引：55

作者：

Han, Li ^{[1
,2
]}

Yao, Jianfeng ^{[2
]}

Li, Dan ^{[2
]}

Ho, Jenny ^{[2
]}

Zhang, Xinyi ^{[2
]}

Kong, Chun-Hua ^{[3
]}

Zong, Zhi-Min ^{[1
]}

Wei, Xian-Yong ^{[1
]}

Wang, Huanting ^{[2
]}

机构：

[1] China Univ Min & Technol, Sch Chem Engn, Jiangsu 221008, Peoples R China

[2] Monash Univ, Dept Chem Engn, Clayton, Vic 3800, Australia

[3] Univ New S Wales, Electron Microscope Unit, Sydney, NSW 2052, Australia

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2008年 / 18卷 / 28期

关键词：

D O I：

10.1039/b805133j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 0.8SiO(2) : 1.0Al(2)O(3) : 21.2Na(2)O : 86.0H(2)O : 7.4-28.7 acrylamide (AM) were used to produce hollow sodalite spheres. The synthesized hollow sodalite spheres had diameters of 1-5 mu m and shell thicknesses of 0.5-1 mu m, and the sphere diameters decreased from 5-10 mu m to 1-3 mu m 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 0.8SiO(2) : 1.0Al(2)O(3) : 2.6Na(2)O : 16.4H(2)O : 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.

引用

页码：3337 / 3341

页数：5

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