文献类型：期刊文献

英文题名：Angstrom-scale channels with versatile ion-membrane interactions enabling precise ion separation via electrodialysis

作者：Zhang, Yiren[1];Lin, Yuqing[1];Gan, Ning[1];Zhang, Jiayu[1];Wu, Baolong[1];Yu, Jianguo[1];Matsuyama, Hideto[2];Wang, Rong[3,4]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Comprehens Utilizat Salt Lake Re, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]Kobe Univ, Res Ctr Membrane & Film Technol, Dept Chem Sci & Engn, Kobe, Japan;[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

年份：2024

卷号：70

期号：10

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20242516287204);WOS:【SCI-EXPANDED(收录号:WOS:001248672000001)】；

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：angstrom-scale channel; electrodialysis; electrostatic interaction; hydrogen bonding; mono/multivalent ion separation

摘要：In nature, efficient and selective ion transport is facilitated by ion-conductive channels in cell membranes; these channels reveal an architectural design with specialized functionality. Drawing inspiration from this, mechanistic insights into the angstrom-scale-channel membrane composed of ionic-crosslinked polybenzimidazole and sulfonated poly(ether ether ketone), exhibiting functional differentiation and efficient ion-sieving properties are presented. Nanochannels allow for strong hydrogen-bonding interactions with hydrated ions of higher polarity, while rendering significant electrostatic charge effects that impede the transition of multivalent ions by compressing effective passageways. Both hydrogen bonding and electrostatic interactions synergistically result in high selectivity for monovalent ions over multivalent ions because the latter requires overcoming higher energy barriers for transport compared with the former, thereby causing varying extents of ion dehydration within the nanochannels. The resulting membrane achieves a high monovalent ion permeation rate of 1.35 mol m-2 h-1 with a high mono/multivalent ion selectivity of 56.5 for K+/Mg2+ and 286 for K+/Al3+.