金属-有机框架材料MIL-101(Fe)在醇胺溶液中的稳定性研究  

The stability of metal-organic framework MIL-101(Fe)in alkylol amine solutions

作　　者：赵盈喆 张建玲[1,2] 程修艳 胡靖阳 徐明钊 陈刚 Yingzhe Zhao;Jianling Zhang;Xiuyan Cheng;Jingyang Hu;Mingzhao Xu;Gang Chen(Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China;School of Chemical Science,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院化学研究所,北京100190 [2]中国科学院大学化学科学学院,北京100049

出　　处：《中国科学：化学》2022年第5期731-737,共7页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(编号:22033009)资助项目。

摘　　要：金属-有机框架(MOF)材料在液相体系中的稳定性对其应用具有重要意义.本文研究了铁基MOF材料MIL-101(Fe)在乙醇胺/乙醇、二乙醇胺/乙醇、三乙醇胺/乙醇溶液中的稳定性.采用X射线衍射、扫描电子显微镜、透射电子显微镜、红外光谱、X射线光电子能谱、能量色散X射线谱等手段对MIL-101(Fe)及经醇胺溶液不同处理时间所得样品的结构、形貌、组成等进行了表征.结果表明,实验条件下,MIL-101(Fe)在醇胺溶液中经历了部分MOF骨架坍塌、醇胺对苯二甲酸盐生成两个过程.通过Lewis酸碱理论对可能的机理进行了解释.The stability of metal-organic frameworks(MOFs)in liquid phase systems is important for their applications in different fields.Herein,the stability of iron-based MOF MIL-101(Fe)in alkylol amine solutions was studied.MIL-101(Fe)was treated in alkylol amine solutions for different time and the samples obtained were characterized by X-ray diffraction,scanning electron microscopy,transmission electron microscopy,infrared spectroscopy,X-ray photoelectron spectroscopy and X-ray dispersion spectroscopy.The results show that under the experimental conditions,the crystal structure of MIL-101(Fe)partially collapses,followed by the formation of alkylol ammonium terephthalate.The possible mechanism was proposed according to Lewis acid and base theory.

关 键 词：金属-有机框架材料 MIL-101(Fe) 醇胺 液相体系 稳定性 

分 类 号：O641.4[理学—物理化学] O622.6[理学—化学]