Synthesis of two-dimensional ordered graphdiyne membranes for highly efficient and selective water transport

被引:2
作者
Li, Jiaqiang [1 ]
Zhou, Ke [2 ]
Liu, Qing [1 ]
Tian, Bo [1 ,3 ]
Liu, Xiaowei [1 ]
Cao, Li [1 ]
Cao, Haicheng [4 ]
Li, Guanxing [1 ,5 ]
Zhang, Xixiang [1 ]
Han, Yu [6 ,7 ,8 ]
Lai, Zhiping [1 ]
机构
[1] King Abdullah Univ Sci & Technol KAUST, Div Phys Sci & Engn PSE, Thuwal, Saudi Arabia
[2] Soochow Univ, Soochow Inst Energy & Mat Innovat SIEMIS, Coll Energy, Jiangsu Prov Key Lab Adv Carbon Mat & Wearable Ene, Suzhou, Peoples R China
[3] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore, Singapore
[4] King Abdullah Univ Sci & Technol, Div Comp Elect & Math Sci & Engn, Thuwal, Saudi Arabia
[5] Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY USA
[6] South China Univ Technol, Ctr Electron Microscopy, Guangzhou, Peoples R China
[7] South China Univ Technol, Sch Emergent Soft Matter, Guangzhou, Peoples R China
[8] South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou, Peoples R China
来源
NATURE WATER | 2025年 / 3卷 / 03期
关键词
PROTON TRANSPORT; OXIDE; DESALINATION; PERMEATION; NANOSHEETS; IONS;
D O I
10.1038/s44221-025-00397-9
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Developing artificial membranes with stable and uniform angstrom-scale channels that can effectively reject hydrated ions is a substantial challenge but important in water desalination and energy conversion/storage applications. Achieving precise water/ions separation while maintaining high water flux requires a membrane microstructure engineered with molecular precision. This study reports the successful synthesis of ultra-thin, centimetre-scale graphdiyne (GDY) films with ordered one-dimensional (1D) channels using single-crystalline Cu (111) as the growth substrate and demonstrates their exceptional performance as molecular sieves for highly efficient water/ion separation. The optimized membrane exhibits an ultra-high water/NaCl selectivity of 5.96 x 104, outperforming state-of-the-art membranes, at a water permeance of similar to 32.9 mol m-2 h-1 bar-1 and a salt rejection exceeding 99.7% for small ions in seawater. Mechanism studies reveal that the hydrophobic angstrom-scale channels in GDY crystals force water molecules into a single-file configuration with 1D hydrogen bond during water permeation. The 1D water chain enables the GDY membrane to facilitate rapid (diffusion constant as high as 1.3 x 10-4 cm2 s-1) and selective proton transport via the Grotthuss mechanism. This work contributes to the development of carbon nanomaterial membranes for precise molecular sieving and biomimetic protonophores.
引用
收藏
页码:307 / 318
页数:15
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