文献类型：期刊文献

英文题名：The role of ion-membrane interactions in fast and selective mono/multivalent ion separation with hierarchical nanochannels

作者：Zhang, Jiayu[1];Lin, Yuqing[1];Zhang, Yiren[1];Wu, Baolong[1];Cao, Xingzhong[2];Shi, Zhenjia[1];Xu, Zhicheng[1];Ying, Jiadi[1];Jin, Yan[1];She, Qianhong[3,4];Matsuyama, Hideto[5];Yu, Jianguo[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Comprehens Utilizat Salt Lake Re, Sch Resources & Environm Engn, Shanghai, Peoples R China;[2]Chinese Acad Sci, Inst High Energy Phys, Multidisciplinary Res Div, Beijing, Peoples R China;[3]Nanyang Technol Univ, Nanyang Environm & Water Res Inst, Singapore Membrane Technol Ctr, Singapore, Singapore;[4]Nanyang Technol Univ, Sch Civil & Environm Engn, Nanyang, Singapore;[5]Kobe Univ, Res Ctr Membrane & Film Technol, Dept Chem Sci & Engn, Kobe, Japan

年份：2023

卷号：69

期号：12

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20233614674764);WOS:【SCI-EXPANDED(收录号:WOS:001195273800020)】；

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

语种：英文

外文关键词：ion dehydration-rehydration process; mono/multivalent ion separation; monovalent ion quick transport; polyelectrolyte membrane; selective electrodialysis

摘要：Precise control over the nanofluid behavior of polyelectrolyte-based membranes is a primary step toward understanding the structure-morphology-property relationships to ultimately determine the mass transfer characteristics. In this study, a high-performance multistacked polyelectrolyte-based cation exchange membrane (CEM) with a heterogeneous structure and versatile surface chemistry was developed to achieve selective ion conductance. The self-assembled CEM can facilitate ion permeation with fluxes of 2.9 mol m(-2 )h(-1) for K+ and 0.22 mol m(-2) h(-1) for Mg2+, reaching a mono/multivalent ionic selectivity of up to 13, outperforming mono/divalent fractionation when compared with state-of-the-art membranes. Molecular dynamic (MD) simulations illustrated the ionic transport trajectory in hierarchical channels with angstrom-scale cavities using multilayered CEMs. Both the experimental measurements and theoretical simulations indicated that ionic fractionation was associated with a large disparity in the energy barrier between mono/multivalent cations, which was the primary origin of the differences in the ion dehydration-rehydration processes in the angstrom-confinement membrane ion channels.