期刊
CHEMICAL ENGINEERING SCIENCE
卷 225, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2020.115845
关键词
Membrane separation; Nanofiltration; Sacrificed metal-organic framework (MOF); Polyphenol; Dye removal; Water flux
资金
- National Natural Science Foundation of China [21878062]
- Open Project of State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) [QA201922]
Nanofiltration membanes play a critical role in alleviating global water scarcity, affecting more than 4 billion people. Herein, a new metal organic framework (MOF) sacrificicial strategy is designed to synthesize flux-enhancing nanofiltration membrane for efficient dye removal. With the aid of polyphenol chemistry, ZIF-67 MOF was first coated onto a porous support and in situ transformed into a selective layer by virtue of pyrrole polymerization. Trigerred by ammonium persulfate, polypyrrole selective layer functioalized nanofiltration membrane was fabricated when accompanying pore regulation by MOF self-sacrifice. The membrane demonstrated a flux enhancement of 745% than pristine polypyrrole (PPy) one with maintained rejection. Furthermore, the synergistic interactions among polypyrrole, polyphenol, and porous support endowed membrane with excellent stability during long term test. The designed MOF sacrificed route may open a new avenue for fabricating advanced energetic-efficient membranes with the reconstructed architecture towards diverse separation applications. (C) 2020 Elsevier Ltd. All rights reserved.
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