文献类型：期刊文献

英文题名：Bio-Inspired 2D Asymmetric Nanochannels for High-Resolution Li+/Mg2+ Separation

作者：Wang, Shuai[1,2,3];Fang, Chuanjie[3];Huang, Yi[4];Yi, Ruobing[5];Wu, Mengjiao[1];Wang, Yan[2,3];Li, Fupeng[3];Zhu, Liping[2,3];Liang, Shanshan[1];Chen, Liang[4,6]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]Zhejiang Univ, Dept Polymer Sci & Engn, MOE Key Lab Macromol Synth & Functionalizat, Hangzhou 310027, Peoples R China;[3]Zhejiang Univ, Shaoxing Inst, Ctr Healthcare Mat, Shaoxing 312000, Peoples R China;[4]Zhejiang A&F Univ, Coll Optomech Engn, Hangzhou 311300, Peoples R China;[5]Shandong Univ Technol, Sch Chem & Chem Engn, Zibo 255049, Peoples R China;[6]Ningbo Univ, Sch Phys Sci & Technol, Ningbo 315211, Peoples R China

年份：2025

卷号：64

期号：39

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20253218952084);WOS:【SCI-EXPANDED(收录号:WOS:001547130300001)】；

基金：The authors are grateful for the financial support from the National Natural Science Foundation of China (U21A20302), the "Pioneer" and "Leading Goose" R&D Program of Zhejiang (2024C03132 and 2024C03134), the Ningbo S&T Innovation 2025 Major Special Programme (2023Z102), and the Fundamental Research Funds for the Central Universities (226-2025-00011). The staff members from the BL06B beamline of the Shanghai Synchrotron Radiation Facility (SSRF) are gratefully acknowledged for their help.

语种：英文

外文关键词：2D Membranes; Asymmetric nanochannels; Bio-inspired; Graphene oxide; Li+/Mg2+ separation

摘要：Extracting lithium from salt lake brines is crucial to achieve sustainable development of lithium resources. However, it remains a major challenge to design nanochannels with efficient selectivity and fast transport for target ions. Here, inspired by biological membranes, we reported a Janus graphene oxide membrane (JGOM) with an asymmetric structure that exhibits diode-like ion transport behavior and achieves high-efficiency Li+/Mg-2(+) separation for lithium extraction applications. During the forward transport of ions, the nGO nanochannels modified by sulfonate groups (SO3-) with precise size provide hopping recognition sites and additional electrostatic attraction for the fast transport of Li+, while imposed Mg2+ dehydration and exposure to a stronger positive charge. The continuous pGO nanochannels modified by amino groups (NH3+) further prevent the passage of dehydrated Mg2+ by enhanced electrostatic repulsion while allowing Li+ to transfer. Under the synergy of the two nanochannels, the JGOM demonstrates robust Li+/Mg2+ separation performance, outperforming symmetrical structure GO membranes and other reported membranes, which was further confirmed by simulation results. This study provides a new insight into the rational design of ion sieving membranes.