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Ultrafast ion sieving using nanoporous polymeric membranes

Author

Listed:
  • Pengfei Wang

    (Peking University)

  • Mao Wang

    (Peking University)

  • Feng Liu

    (Peking University
    Peking University)

  • Siyuan Ding

    (Peking University)

  • Xue Wang

    (Peking University)

  • Guanghua Du

    (Chinese Academy of Sciences)

  • Jie Liu

    (Chinese Academy of Sciences)

  • Pavel Apel

    (Joint Institute for Nuclear Research)

  • Patrick Kluth

    (Australian National University)

  • Christina Trautmann

    (GSI Helmholtzzentrum and Technische Universität Darmstadt)

  • Yugang Wang

    (Peking University)

Abstract

The great potential of nanoporous membranes for water filtration and chemical separation has been challenged by the trade-off between selectivity and permeability. Here we report on nanoporous polymer membranes with an excellent balance between selectivity and permeability of ions. Our membranes are fabricated by irradiating 2-μm-thick polyethylene terephthalate Lumirror® films with GeV heavy ions followed by ultraviolet exposure. These membranes show a high transport rate of K+ ions of up to 14 mol h−1 m−2 and a selectivity of alkali metal ions over heavy metal ions of >500. Combining transport experiments and molecular dynamics simulations with a polymeric nanopore model, we demonstrate that the high permeability is attributable to the presence of nanopores with a radius of ~0.5 nm and a density of up to 5 × 1010 cm−2, and the selectivity is ascribed to the interaction between the partially dehydrated ions and the negatively charged nanopore wall.

Suggested Citation

  • Pengfei Wang & Mao Wang & Feng Liu & Siyuan Ding & Xue Wang & Guanghua Du & Jie Liu & Pavel Apel & Patrick Kluth & Christina Trautmann & Yugang Wang, 2018. "Ultrafast ion sieving using nanoporous polymeric membranes," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-02941-6
    DOI: 10.1038/s41467-018-02941-6
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    Cited by:

    1. Weiwen Xin & Jingru Fu & Yongchao Qian & Lin Fu & Xiang-Yu Kong & Teng Ben & Lei Jiang & Liping Wen, 2022. "Biomimetic KcsA channels with ultra-selective K+ transport for monovalent ion sieving," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    2. Andrzej Olejniczak & Ruslan A. Rymzhanov, 2023. "From nanohole to ultralong straight nanochannel fabrication in graphene oxide with swift heavy ions," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    3. Zongyao Zhou & Kangning Zhao & Heng-Yu Chi & Yueqing Shen & Shuqing Song & Kuang-Jung Hsu & Mojtaba Chevalier & Wenxiong Shi & Kumar Varoon Agrawal, 2024. "Electrochemical-repaired porous graphene membranes for precise ion-ion separation," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    4. Rongming Xu & Yuan Kang & Weiming Zhang & Bingcai Pan & Xiwang Zhang, 2023. "Two-dimensional MXene membranes with biomimetic sub-nanochannels for enhanced cation sieving," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    5. Jiao, Yanmei & Yang, Chun & Zhang, Wenyao & Wang, Qiuwang & Zhao, Cunlu, 2024. "A review on direct osmotic power generation: Mechanism and membranes," Renewable and Sustainable Energy Reviews, Elsevier, vol. 191(C).

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