Engineering artificial water channels into ionic covalent organic framework membranes towards efficient desalination

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2025-04-29 DOI:10.1016/j.seppur.2025.133297

Xianghao Meng , Fan Yi , Yue Qi , Jie Gao , Zeyu Pei , Zexuan He , Guo Wang , Changting Hong , Li-Bo Huang , Zhongyi Jiang

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引用次数: 0

Abstract

Artificial water channels (AWCs), inspired by biological aquaporins, feature unique directional transport pathways and distinct water permselectivity. However, processing discrete AWCs superstructures into membranes is quite challenging due to the weak intermolecular interactions and poor membrane-forming capability. Herein, we applied a mixed-dimensional self-assembly strategy to combine AWCs with ionic covalent organic framework (COF) nanosheets, resulting in a hierarchical structure of AWCs inserting into the interlayer of COF membranes. AWCs and COF nanosheets exhibited excellent compatibility, enabling AWCs-COF membranes to achieve highly efficient water permeation with significant Å-scale ionic sieving. The optimal membranes manifest a water permeance of 5.32 L m^-2 h⁻¹ bar⁻¹ and a NaCl rejection of 97.7 %, superior to most reported desalination membranes. Furthermore, AWCs-COF membranes display high stability with the performance decline below 5 % during 14-day filtration. This work explores the collaborative optimization of AWCs and two-dimensional materials, thereby inspiring the rational design of high-performance desalination membranes.

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工程人工水通道进入离子共价有机框架膜，实现高效脱盐

人工水通道（AWCs）受生物水通道蛋白的启发，具有独特的定向运输途径和明显的水选择性。然而，由于分子间相互作用弱，成膜能力差，将离散AWCs超结构加工成膜是相当具有挑战性的。本文采用混合维自组装策略，将AWCs与离子共价有机框架（COF）纳米片结合，使AWCs嵌入到COF膜的夹层中，形成层次结构。AWCs和COF纳米片表现出优异的相容性，使AWCs-COF膜能够通过显著的Å-scale离子筛分实现高效的水渗透。最佳膜的渗透率为5.32 L m-2h−1 bar−1，NaCl去除率为97.7% %，优于大多数报道的脱盐膜。此外，AWCs-COF膜具有很高的稳定性，过滤14天后性能下降低于5 %。本研究探索了AWCs与二维材料的协同优化，从而启发了高性能脱盐膜的合理设计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.