Facile synthesis of zeolitic imidazolate framework-8 from a concentrated aqueous solution

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• 作者：Ming He ; Jianfeng Yao ; Qi Liu ; Kun Wang ; Fanyan Chen ; Huanting Wang
• 关键词：Zeolitic imidazolate framework ; ZIF-8 ; Synthesis ; Ammonium hydroxide ; Aqueous solution
• 刊名：Microporous and Mesoporous Materials
• 出版年：15 January, 2014
• 年：2014
• 卷：184
• 期：Complete
• 页码：55-60
• 全文大小：2318 K

文摘

This paper reports a facile method for the synthesis of zeolitic imidazolate framework-8 (ZIF-8) at room temperature in 10 min. ZIF-8 crystals were produced from stoichiometric metal and ligand (1:2) concentrated aqueous solutions in the presence of ammonium hydroxide. The resulting ZIF-8 crystals possessed high surface area, large micropore volume, and had a truncated cubic morphology with an average particle size of ca. 0.7 渭m. TGA and XRD results revealed the structural stability of the as-synthesized ZIF-8 up to 250 掳C. The addition of an appropriate amount of ammonium hydroxide was proved to be essential for the formation of ZIF-8 crystal through deprotonation and coordination reaction. Furthermore, ZIF-8 crystals were successfully prepared from different zinc sources, and this method is promising for large-scale synthesis of ZIFs.