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Laminated self-standing covalent organic framework membrane with uniformly distributed subnanopores for ionic and molecular sieving

Author

Listed:
  • Yang Li

    (Sichuan University)

  • Qianxun Wu

    (Sichuan University)

  • Xinghua Guo

    (Sichuan University)

  • Meicheng Zhang

    (Sichuan University)

  • Bin Chen

    (Northwest Institute of Nuclear Technology)

  • Guanyi Wei

    (Northwest Institute of Nuclear Technology)

  • Xing Li

    (Sichuan University)

  • Xiaofeng Li

    (Sichuan University)

  • Shoujian Li

    (Sichuan University)

  • Lijian Ma

    (Sichuan University)

Abstract

The preparation of subnanoporous covalent-organic-framework (COF) membranes with high performance for ion/molecule sieving still remains a great challenge. In addition to the difficulties in fabricating large-area COF membranes, the main reason is that the pore size of 2D COFs is much larger than that of most gas molecules and/or ions. It is urgently required to further narrow their pore sizes to meet different separation demands. Herein, we report a simple and scalable way to grow large-area, pliable, free-standing COF membranes via a one-step route at organic–organic interface. The pore sizes of the membranes can be adjusted from >1 nm to sub-nm scale by changing the stacking mode of COF layers from AA to AB stacking. The obtained AB stacking COF membrane composed of highly-ordered nanoflakes is demonstrated to have narrow aperture (∼0.6 nm), uniform pore distribution and shows good potential in organic solvent nanofiltration, water treatment and gas separation.

Suggested Citation

  • Yang Li & Qianxun Wu & Xinghua Guo & Meicheng Zhang & Bin Chen & Guanyi Wei & Xing Li & Xiaofeng Li & Shoujian Li & Lijian Ma, 2020. "Laminated self-standing covalent organic framework membrane with uniformly distributed subnanopores for ionic and molecular sieving," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-019-14056-7
    DOI: 10.1038/s41467-019-14056-7
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    Cited by:

    1. Weipeng Xian & Xiuhui Zuo & Changjia Zhu & Qing Guo & Qing-Wei Meng & Xincheng Zhu & Sai Wang & Shengqian Ma & Qi Sun, 2022. "Anomalous thermo-osmotic conversion performance of ionic covalent-organic-framework membranes in response to charge variations," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Xiaoyao Wang & Benbing Shi & Hao Yang & Jingyuan Guan & Xu Liang & Chunyang Fan & Xinda You & Yanan Wang & Zhe Zhang & Hong Wu & Tao Cheng & Runnan Zhang & Zhongyi Jiang, 2022. "Assembling covalent organic framework membranes with superior ion exchange capacity," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    3. Niaz Ali Khan & Runnan Zhang & Xiaoyao Wang & Li Cao & Chandra S. Azad & Chunyang Fan & Jinqiu Yuan & Mengying Long & Hong Wu & Mark. A. Olson & Zhongyi Jiang, 2022. "Assembling covalent organic framework membranes via phase switching for ultrafast molecular transport," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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