文献类型：期刊文献

英文题名：Unexpected Ion Sieving in Graphene Oxide Membranes

作者：Wang, Shuai[1,2];Yang, Yizhou[1];Liu, Junfan[3];Chen, Liang[3];Liang, Shanshan[1];Fang, Haiping[1]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]Zhejiang A&F Univ, Dept Environm & Resources, Hangzhou 311300, Peoples R China

年份：2022

卷号：126

期号：22

起止页码：9572

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY C

收录：;EI(收录号：20222412224030);WOS:【SCI-EXPANDED(收录号:WOS:000810248900001)】；

基金：This work was supported by the National Natural Science Foundation of China (12004110, 11974366, 12074341, 12004109, 12147169) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Desalination - Ions - Iron compounds - Membranes - Sodium compounds - Water treatment

摘要：Ion sieving is significantly important in many fields such as life science, resource utilization, and environmental protection. However, unlike biological ion channels, realizing efficient ion sieving using two-dimensional (2D) membranes with artificial ion channels is severely restrained because of swelling. In this work, we demonstrated that graphene oxide membranes (GOMs) with the interlayer spacings controlled by K+ (K-GOMs) provide a remarkably enhanced ion sieving performance in mono-/multi-valent mixed ion systems, in which ion selectivity is more than 1 order of magnitude than that of untreated GOMs. The highest selectivity of Na+/Fe3+ for K-GOMs reached up to 159.1, which is superior to most of the state-of the art NF or 2D membranes, and the competitive permeation rate of Na+ ions still remained at 0.48 mol m(-2) h(-1). Additionally, the K-GOMs also showed an outstanding stability in the long-term test. Further, the K-GOMs also presented high selectivity for multi-valent/multi-valent mixed ion systems. Overall, this study gives a full picture of the excellent performance of K-GOMs based on the size effect for ion sieving and exhibits great value in real-world applications such as desalination, water treatment, battery, and even in life science.