Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, Hubei Province, P. R. China.
Sci Rep. 2017 Aug 21;7(1):8912. doi: 10.1038/s41598-017-09364-1.
Metal-organic framework (MOF) membranes have received increasing attention as adsorbents, yet single phase MOF membranes have certain limitations, which frustrate their capacity performance. In this work a MOF composite membrane was successfully prepared by a facile and green strategy through reasonable design. At first, a defect-free ZIF-8 membrane was fabricated on an ionic liquid modified pencil bar by a solvothermal method. Then, a novel poly(ethylenglycol) functionalized ZIF-8 composite membrane (ZIF-8/PEG-NH) was prepared through a flexible coordination-based post-synthetic modification strategy. We found that reaction time and temperature were two crucial factors for successfully fabricating well-defined ZIF-8/PEG-NH membrane. Besides, the adsorption of phenolic endocrine disruptors (e.g., 4-nonylphenol) on original ZIF-8 membrane and ZIF-8/PEG-NH membrane was investigated, and the good adsorption selectivity of ZIF-8/PEG-NH membrane towards 4-nonylphenol was demonstrated, with high adsorption capacity and fast adsorption dynamics. Excitingly, such ZIF-8/PEG-NH membrane was successfully employed for the selective detection of 4-nonylphenol from environmental water samples, demonstrating its great application potential in environmental monitoring.
金属-有机骨架（MOF）膜作为吸附剂受到了越来越多的关注，但单相 MOF 膜存在一定的局限性，限制了其容量性能。在这项工作中，通过合理的设计，成功地采用一种简单、绿色的策略制备了 MOF 复合膜。首先，通过溶剂热法在离子液体修饰的铅笔杆上制备了无缺陷的 ZIF-8 膜。然后，通过灵活的基于配位的后合成修饰策略制备了新型聚（乙二醇）功能化 ZIF-8 复合膜（ZIF-8/PEG-NH）。我们发现反应时间和温度是成功制备具有明确定义的 ZIF-8/PEG-NH 膜的两个关键因素。此外，还研究了原始 ZIF-8 膜和 ZIF-8/PEG-NH 膜对酚类内分泌干扰物（如 4-壬基酚）的吸附，证明了 ZIF-8/PEG-NH 膜对 4-壬基酚具有良好的吸附选择性，具有高吸附容量和快速吸附动力学。令人兴奋的是，这种 ZIF-8/PEG-NH 膜成功地用于从环境水样中选择性检测 4-壬基酚，展示了其在环境监测中的巨大应用潜力。
