文献类型：期刊文献

英文题名：Unexpected Self-Assembly of Nanographene Oxide Membranes upon Electron Beam Irradiation for Ultrafast Ion Sieving

作者：Dai, Fangfang[1,2];Gu, Zonglin[3,4];Hu, Shouyuan[1];Peng, Bingquan[2];Yang, Rujie[5];Jiang, Jie[1];Yao, Lufeng[6];Liang, Shanshan[5];Tu, Yusong[3,4];Li, Pei[1,7,8];Chen, Liang[1]

机构：[1]Ningbo Univ, Sch Phys Sci & Technol, Ningbo 315211, Peoples R China;[2]Univ Chinese Acad Sci, Wenzhou Inst, Wenzhou 325000, Zhejiang, Peoples R China;[3]Yangzhou Univ, Sch Phys Sci & Technol, Yangzhou 225009, Peoples R China;[4]Yangzhou Univ, Microelect Ind Res Inst, Yangzhou 225009, Jiangsu, Peoples R China;[5]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[6]Naval Univ Engn, Dept Basic Courses, Wuhan 430033, Peoples R China;[7]Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China;[8]Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

年份：2024

卷号：11

期号：34

外文期刊名：ADVANCED SCIENCE

收录：;EI(收录号：20242816674916);WOS:【SCI-EXPANDED(收录号:WOS:001263694400001)】；

基金：This work was supported by the National Natural Science Foundation of China (12074341, 12075201, and 12104394), the Scientific Research and Developed Funds of Ningbo University (No. ZX2022000015), and State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, P. R. China (KF2023_07).

语种：英文

外文关键词：electron beam irradiation; nanographene oxide (nGO) membrane; ultrafast ion sieving; ultrahigh water permeance

摘要：Nanographene oxide (nGO) flakes-graphene oxide with a lateral size of approximate to 100 nm or less-hold great promise for superior flux and energy-efficient nanofiltration membranes for desalination and precise ionic sieving owing to their unique high-density water channels with less tortuousness. However, their potential usage is currently limited by several challenges, including the tricky self-assembly of nano-sized flakes on substrates with micron-sized pores, severe swelling in aqueous solutions, and mechanical instability. Herein, the successful fabrication of a robust membrane stacked with nGO flakes on a substrate with a pore size of 0.22 mu m by vacuum filtration is reported. This membrane achieved an unprecedented water permeance above 819.1 LMH bar-1, with a high rejection rate of 99.7% for multivalent metal ions. The nGO flakes prepared using an electron beam irradiation method, have uniquely pure hydroxyl groups and abundant aromatic regions. The calculations revealed the strong hydrogen bonds between two nGO flakes, which arise from hydroxyl groups, coupled with hydrophobic aromatic regions, greatly enhance the stability of stacked flakes in aqueous solutions and increase their effective lateral size. The research presents a simple yet effective approach toward the fabrication of advanced 2D nanographene membranes with superior performance for ion sieving applications. A simple yet effective approach toward the fabrication of nanographene oxide (nGO) membranes with superior performance for ion sieving is developed in this work. image