文献类型：期刊文献

英文题名："Cation-Recognition" Effect of 2D Nanochannels in Graphene Oxide Membranes Intercalated with Ionic Liquid for High Desalination Performance

作者：Yang, Rujie[1,2];Liang, Zhuolin[3];Wu, Baolong[4];Di, Yingjie[1];Lin, Yuqing[4];Wu, Shujin[5];Liu, Quan[3];Liang, Shanshan[1,2,5]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou, Shanghai 200237, Peoples R China;[3]Anhui Univ Sci & Technol, Analyt & Testing Ctr, Sch Chem Engn, Huainan 232001, Peoples R China;[4]East China Univ Sci & Technol, Natl Engn Res Ctr Comprehens Utilizat Salt Lake Re, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[5]China Univ Petr Beijing Karamay, Karamay 834000, Xinjiang, Peoples R China

年份：2025

卷号：21

期号：7

外文期刊名：SMALL

收录：;EI(收录号：20250117641893);WOS:【SCI-EXPANDED(收录号:WOS:001387330000001)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 12004110, 12074341, 12147169, and 11974366), the Fundamental Research Funds for the Central Universities, Anhui Provincial Natural Science Foundation (No. 2108085QB50), Natural Science Foundation of Xinjiang Uygur Autonomous Region (No. 2024D01A158), the Research Foundation of China University of Petroleum-Beijing at Karamay (No. XQZX20240037), and the Fundamental Research Funds for the Central Universities of East China University of Science and Technology. The staff members from the BL06B beamline of Shanghai Synchrotron Radiation Facility (SSRF) are gratefully acknowledged for their help.

语种：英文

外文关键词："cation-recognition" effects; desalination; graphene oxide membranes; ionic liquids; water permeances

摘要：Water and ion transport in nanochannels is crucial for membrane-based technology in biological systems. 2D materials, especially graphene oxide (GO), the most frequently used as the starting material, are ideal building blocks for developing synthetic membranes. However, the selective exclusion of small ions while maintaining in a pressured filtration process remains a challenge for GO membranes. Herein, a novel "cation-recognition" effect is introduced within the nanochannels of reduced GO (rGO) membranes modified by ionic liquids (IL) to enhance the desalination performance. The resulting IL-intercalated rGO (IL-rGO) membranes exhibit remarkable stability even under prolonged exposure to acidic and basic conditions, without damage or delamination and maintain approximately ultrahigh water permeance (approximate to 32.0 L m-2 h-1 bar-1) and high Na2SO4 rejection. The density functional theory calculations revealed that IL-rGO nanochannels exhibited different exclusion effects on cations (Na+ and /or K+) and the attraction effect on water molecules, which led to the "cation-recognition" effect. Overall, this work provides a theoretical framework in sub-nanochannels for developing advanced 2D nanochannels to address the critical challenge of freshwater scarcity.