文献类型：期刊文献

英文题名：Trefoil-like COFs membrane fabricated by interfacial polymerization for dye/salt separation

作者：Peng, Shuo[1];Fang, Yin-Xin[1];Xu, Zhen-Liang[1,3];Jia, Rui[1];Han, Rui[1];Yu, Lin[1];Xu, Sun-Jie[1,2,3]

机构：[1]East China Univ Sci & Technol, Chem Engn Res Ctr, Sch Chem Engn, State Key Lab Chem Engn,Membrane Sci & Engn R&D La, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Shanghai Elect Chem Innovat Inst, Shanghai 200237, Peoples R China

年份：2025

卷号：355

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20243817061514);WOS:【SCI-EXPANDED(收录号:WOS:001318243500001)】；

基金：The authors gratefully acknowledge the financial support from the National Key R & D Program of China (2021YFB3801103 and 2021YFB3801101) and the National Natural Science Foundation of China (22078092, 22078088 and 22208101) as well as the research funding provided by the Fundamental Research Funds for the Central Universities (JKA01241502) .

语种：英文

外文关键词：Covalent organic frameworks; Interfacial polymerization; Dye/salt separation; Ortho-position monomer

摘要：Covalent organic frameworks (COFs) with beta-ketoenamine structure have shown notable effectiveness in water treatment. In general, COFs can be constructed by the interfacial polymerization (IP) between a C-2 symmetry monomer with para-position reaction groups and a C-3, C-4 and C-6 symmetry functionalized monomer. The constrained availability of para-position monomers limits the diversity of COFs synthesis options, necessitating exploration into non-para-position alternatives. Herein, 2,4,6-triformylphloroglucinol (Tp) and ortho-position monomer o-phenylenediamine (OPD) are employed to fabricate a composite membrane featuring COFs with a special trefoil-like structure by interfacial polymerization method. The optimal OPD-Tp COFs/Nylon nanofiltration (NF) membrane has 99.8 % rejection for CR and only 3.2 % rejection for NaCl. Meanwhile, the pure water permeation flux is 132 L m(-2) h(-1) bar(-1). This study shows the significant potential for dye/salt separation of the prepared COFs composite NF membrane and broadens the monomer selective range for the COFs membrane fabrication.