文献类型：期刊文献

英文题名：Ion-selective supramolecular membrane with pH-regulated smart nanochannels for lithium extraction

作者：Gan, Ning[1,2];Lin, Yuqing[2];Zhang, Yiren[2];Qiu, Yulong[2];Yu, Jianguo[2];She, Qianhong[3,4];Ooya, Tooru[5];Lin, Qian[1];Matsuyama, Hideto[6]

机构：[1]Guizhou Univ, Sch Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China;[2]East China Univ Sci & Technol, Natl Engn Res Ctr Comprehens Utilizat Salt Lake Re, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[3]Nanyang Technol Univ, Nanyang Environm & Water Res Inst, Singapore Membrane Technol Ctr, Singapore 637141, Singapore;[4]Nanyang Technol Univ, Sch Civil Environm Engn, Singapore 639798, Singapore;[5]Kobe Univ, Grad Sch Med, Dept Med Device Engn, Kobe 6570017, Japan;[6]Kobe Univ, Res Ctr Membrane & Film Technol, Kobe 6578501, Japan

年份：2024

卷号：708

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20242816658901);WOS:【SCI-EXPANDED(收录号:WOS:001267134300001)】；

基金：This research was supported by the National Natural Science Foundation of China (22208095) and the Intergovernmental Cooperation of Science and Technology Program of Shanghai (22520710800). This work was also supported by the Kobe University Strategic International Collaborative Research Grant (Type B Fostering Joint Research).

语种：英文

外文关键词：Supramolecular membrane; Nanofiltration; Lithium separation; pH-responsive gating regularity; Smart nanochannel

摘要：Tunable gating ion-conducting membranes with high water permeability and precise ion selectivity remain urgently demanded in smart nanofiltration for efficient lithium extraction. Herein, inspired by the filtration function of protein channels, we report a smart and high-performance supramolecular membrane constructed via coordination between quaternary ammonium ligands (m-phenylenediamine/polyethyleneimine) and metal ion center (Cu2+). The pore architecture of the supramolecular membrane is dynamic and can be switched by applying pH stimulus, where coordinated interchain expands when exposed to acidic operating conditions and induces concomitantly reinforced electrostatic exclusion due to enhanced local charge density. The tunable gating regularity enables operando modulation of precise ionic separation in situ. The resulting membrane exhibits significantly enhanced water permeance (19.8 L m(-2) h(-1)center dot bar(-1)) and simultaneously promoted Li+/Mg2+ selectivity (RMg2+ = 96.4 %), surpassing typical trade-off between permeability and selectivity at pH 3 condition. This study demonstrates the amazing capability of environmental-responsive regulation of membrane pore-channel structure, and provides inspiration for engineering advanced supramolecular membranes for lithium extraction and beyond.