文献类型：期刊文献

英文题名：Nanoconfined electrostatic interaction for efficient anion sieving in graphene oxide membranes

作者：Wang, Shuai[1,2,3];Huang, Yi[4];Qiang, Yu[2];Wu, Mengjiao[2];Liang, Shanshan[2,5];Wang, Jianyu[3];Fang, Chuanjie[1,3];Zhu, Liping[1,3]

机构：[1]Zhejiang Univ, Dept Polymer Sci & Engn, Key Lab Macromol Synth & Functionalizat, MOE, Hangzhou 310027, Peoples R China;[2]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[3]Zhejiang Univ, Shaoxing Inst, Ctr Healthcare Mat, Shaoxing 312000, Peoples R China;[4]Zhejiang A&F Univ, Coll Optomech Engn, Hangzhou 311300, Peoples R China;[5]China Univ Petr Beijing Karamay, Karamay 834000, Xinjiang, Peoples R China

年份：2025

卷号：270

外文期刊名：WATER RESEARCH

收录：;EI(收录号：20244817437416);WOS:【SCI-EXPANDED(收录号:WOS:001371625000001)】；

基金：This work was supported by the National Natural Science Foundation of China (U21A20302, 1204110) , Zhejiang High-Level 554 Talent Special Support Plan (2021R52027) , "Pioneer" and "Leading Goose" R & D 556557 Program of Zhejiang, China (2022C01029 and 2024C03134) , and "Spearhead goose + X" research and development plan (2024C03132) .

语种：英文

外文关键词：Graphene oxide; Charged nanochannel; Size exclusion; Electrostatic interaction; Anion sieving

摘要：Controllable ion transport and precise ion sieving are crucial for sustainable water treatment and resource recovery. 2D materials, including graphene oxide (GO) with tunable nanochannels, are emerging as ideal material platforms to develop ion sieving membranes. However, accurate ion sieving remains challenging due to the swollen and enlarged interlayer spacing of GO membranes in aqueous solution, resulting in the non-selective of small ions. Here, we reformed the GO nanosheets by physical reduction method and modified them with negatively charged molecule chains. The nanochannel sizes and electronegativity of the stacked 2D membranes were precisely controlled simultaneously. As a result, 2D nanochannel membrane with fast permeability, high efficiency and accurate Cl-/SO4 2-separation was constructed. The characterization and performance analysis further proved that the interlayer spacing and electrification of 2D nanochannels are strongly related to ion sieving. By precisely adjusting the synergy between the two, Cl-/SO4 2-selectivity up to 91.83 with Clpermeation rate of 1.03 mol m- 2 h- 1 was achieved, which is superior to state-of-the-art ion sieving membranes. Our study provides new insights into understanding ion separation mechanisms within nanochannels and enables the development for the precise construction of nanochannels to manipulate the selective transport of ions.