Direct synthesis of zeolitic imidazolate framework-8/chitosan composites in chitosan hydrogels

被引：116
|
作者：
Yao, Jianfeng [1 ]
Chen, Rizhi [1 ]
Wang, Kun [1 ]
Wang, Huanting [1 ]
机构：
[1] Monash Univ, Dept Chem Engn, Clayton, Vic 3800, Australia
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2013年 / 165卷
基金：
澳大利亚研究理事会;
关键词：
Zeolitic imidazolate framework-8; Chitosan; Polymer hydrogel; Crystallization; CAPTURE PROPERTIES; FRAMEWORKS; SIZE; PERFORMANCE; MEMBRANES; NANOCRYSTALS; SEPARATIONS; ZIF-8;
D O I：
10.1016/j.micromeso.2012.08.018
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Zeolitic imidazolate framework-8 (ZIF-8)/chitosan composites were prepared in the chitosan hydrogels. The concentrations of the chitosan and the alkaline solution were varied to the synthesis of the ZIF-8/chitosan composites. In the chitosan hydrogels with the addition of ammonium hydroxide solution, the resulting ZIF-8 crystals exhibited an unusual XRD structure that the XRD peak at about 18 degrees (222) became the strongest. The XRD peak intensity ratio of (222)/(011) increased from 0.68 to 1.5-5.2 in the presence of chitosan hydrogels. ZIF-8/chitosan composites (FC2) were composed of aggregated nano-sized particles, and exhibited a higher CO2 adsorption than normal ZIF-8 crystals. After removing chitosan from FC2, XRD pattern of the resulting ZIF-8 crystals returned to the normal state and the morphology kept the same as the composite. (C) 2012 Elsevier Inc. All rights reserved.
引用
收藏
页码：200 / 204
页数：5
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