A cationic porous organic polymer for high-capacity, fast, and selective capture of anionic pollutants

Zhi-Wei Liu; Cong-Xiao Cao; Bao-Hang Han

doi:10.1016/j.jhazmat.2018.12.091

A cationic porous organic polymer for high-capacity, fast, and selective capture of anionic pollutants

J Hazard Mater. 2019 Apr 5:367:348-355. doi: 10.1016/j.jhazmat.2018.12.091. Epub 2018 Dec 24.

Authors

Zhi-Wei Liu¹, Cong-Xiao Cao², Bao-Hang Han³

Affiliations

¹ 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.
² CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.
³ 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. Electronic address: hanbh@nanoctr.cn.

PMID: 30599407
DOI: 10.1016/j.jhazmat.2018.12.091

Abstract

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^-1 for Pd (II) and 578.5 mg g^-1 for AO7^-), excellent selectivity (e.g., more than 99% removal efficiency for Pd (II) in the presence of 100 times excess of SO₄^2-), 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.

Keywords: Heavy metal ions; Ion exchange; Ionic porous materials; Pd(II) ions; Water remediation.

Publication types

Research Support, Non-U.S. Gov't