文献类型：期刊文献

英文题名：Defect-Selective Etching Engineering of Reduced Graphene Oxide Membranes

作者：Wang, Pengxu[1];Yang, Rujie[1];Liu, Quan[2];Di, Yingjie[1];Zhang, Zhen[1];Tang, Zhehan[3,4];Liang, Shanshan[1,4]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]Anhui Univ Sci & Technol, Analyt & Testing Ctr, Sch Chem & Blasting Engn, Huainan 232001, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol & Low Carbon Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2026

卷号：18

期号：30

起止页码：42138

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20263321283898);Scopus(收录号：2-s2.0-105047037218);WOS:【SCI-EXPANDED(收录号:WOS:001826881300001)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 12004110 and 12435001), Shanghai Science and Technology Innovation Action Plan (No. 23JC1401400), Natural Science Foundation of Xinjiang Uygur Autonomous Region (No. 2024D01A158), and Youth Backbone Teacher Overseas Visiting Study Foundation of Anhui Province (No. JWFX2024007). Thanks go to Mr. Wang Yuan at Anhui University of Science and Technology for his valuable intellectual input throughout our research.

语种：英文

外文关键词：graphene oxide membranes; defect-selective etching; ionic-liquid intercalation; cation-pi interactions; high water permeance

摘要：Two-dimensional laminar membranes hold great promise for advanced water treatment but are inherently limited by a permeability-selectivity trade-off. Herein, we report a nanoscale "defect-excavation" strategy to overcome this limitation in reduced graphene oxide (rGO) membranes by engineering dual transport pathways at the molecular level. Vertical nanopores created by mild KOH etching selectively targeted defect-prone sp3-hybridized carbon domains, carving high-speed shortcuts through the laminar structure. To complement the kinetic nanoetching, we also introduced a thermodynamic stabilization step involving ionic-liquid intercalation, wherein these supramolecular rivets anchor expanded interlayer spacings through robust cation-pi interactions. This synergistic integration created a dual nanoscale transport network that reshaped the transport of water molecules within confined two-dimensional nanochannels. The optimized membrane (KOH-IL-rGO membrane) exhibited an ultrahigh water permeance of 455 L m-2 h-1 bar-1 and a methylene blue rejection of 99.68%. Molecular dynamics simulations further elucidated the cooperative transport mechanism, which provided critical quantitative insights: the vertical shortcuts significantly enhanced the overall water permeance, and the expanded interlayer spacing induced directly underpins the ultrahigh permeance and selective rejection observed. Overall, this work provides a rational materials design approach for constructing high-performance, energy-efficient membranes for sustainable water purification and recovery.