CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China; Sino-Danish Center for Education and Research, Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100190, China.
CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.
J Hazard Mater. 2019 Apr 5;367:348-355. doi: 10.1016/j.jhazmat.2018.12.091. Epub 2018 Dec 24.
The emerging ionic porous organic materials have achieved various applications in different fields, however, there is limited study on using them to capture ionic pollutants from water. Here we demonstrate a facile method to prepare a cationic porous organic polymer via catalyst-free Schiff base reaction. The imidazolium-based polymer (ImPOP-1) was constructed through copolymerizing cationic molecules with low-cost benzidine. The as-prepared ImPOP-1 exhibits high capacity (e.g., 476.2 mg g for Pd (II) and 578.5 mg g for AO7), excellent selectivity (e.g., more than 99% removal efficiency for Pd (II) in the presence of 100 times excess of SO), and fast kinetics (e.g., 98.6% removal efficiency within 5 min for Pd (II) ions) to the anionic pollutants including organic dyes and heavy metal ions. The excellent performance on scavenging anionic pollutants from water suggests that ImPOP-1 holds promising potential as an ion exchange material for water remediation.
新兴的离子多孔有机材料在不同领域已经实现了各种应用，但对于利用它们从水中捕获离子污染物的研究还很有限。在这里，我们展示了一种通过无催化剂席夫碱反应制备阳离子多孔有机聚合物的简便方法。通过将阳离子分子与低成本联苯共聚，合成了基于咪唑鎓的聚合物（ImPOP-1）。所制备的 ImPOP-1 表现出高容量（例如，对于 Pd（II）为 476.2mg/g，对于 AO7 为 578.5mg/g）、优异的选择性（例如，在存在 100 倍过量 SO 的情况下，对于 Pd（II）的去除效率超过 99%）和快速动力学（例如，对于 Pd（II）离子的去除效率在 5 分钟内达到 98.6%），可以去除阴离子污染物，包括有机染料和重金属离子。ImPOP-1 在从水中去除阴离子污染物方面的优异性能表明，它作为水修复用离子交换材料具有广阔的应用前景。
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