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Ion sieving by a two-dimensional Ti3C2Tx alginate lamellar membrane with stable interlayer spacing

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  • Jin Wang

    (Xi’an University of Architecture and Technology)

  • Zhijie Zhang

    (Xi’an University of Architecture and Technology)

  • Jiani Zhu

    (Xi’an University of Architecture and Technology)

  • Mengtao Tian

    (Xi’an University of Architecture and Technology)

  • Shuchang Zheng

    (Xi’an University of Architecture and Technology)

  • Fudi Wang

    (Xi’an University of Architecture and Technology)

  • Xudong Wang

    (Xi’an University of Architecture and Technology)

  • Lei Wang

    (Xi’an University of Architecture and Technology)

Abstract

Two-dimensional membranes attract extensive interest due to the anomalous transport phenomena; however, the ion separation performance is below the theoretical prediction. The stabilization of d-spacing is a key step for enhancing ion selectivity. Here, we demonstrate a strategy for stabilizing the Ti3C2Tx laminar architecture by alginate hydrogel pillars. After pillared by Ca-alginate, the nanochannel diameters are effectively fixed at 7.4 ± 0.2 Å, and the membrane presents a permeation cutoff and an outstanding sieving property towards valent cations. When applied for acid recovery, the outstanding H+/Fe2+ selectivity makes the membrane a promising substitution for traditional ion-exchange membranes. Moreover, the ultrathin Mn-alginate pillared membrane with identical d-spacing exhibits 100% Na2SO4 rejection with high water permeance, which is superior to the state-of-the-art nanofiltration membranes. Building on these findings, we demonstrate an efficient method to tune the ion selectivity and introduce a new perspective for energy- and environment-related applications.

Suggested Citation

  • Jin Wang & Zhijie Zhang & Jiani Zhu & Mengtao Tian & Shuchang Zheng & Fudi Wang & Xudong Wang & Lei Wang, 2020. "Ion sieving by a two-dimensional Ti3C2Tx alginate lamellar membrane with stable interlayer spacing," Nature Communications, Nature, vol. 11(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-17373-4
    DOI: 10.1038/s41467-020-17373-4
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    References listed on IDEAS

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    1. Abozar Akbari & Phillip Sheath & Samuel T. Martin & Dhanraj B. Shinde & Mahdokht Shaibani & Parama Chakraborty Banerjee & Rachel Tkacz & Dibakar Bhattacharyya & Mainak Majumder, 2016. "Large-area graphene-based nanofiltration membranes by shear alignment of discotic nematic liquid crystals of graphene oxide," Nature Communications, Nature, vol. 7(1), pages 1-12, April.
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    Cited by:

    1. Jin Wang & Zheng Cui & Shangzhen Li & Zeyuan Song & Miaolu He & Danxi Huang & Yuan Feng & YanZheng Liu & Ke Zhou & Xudong Wang & Lei Wang, 2024. "Unlocking osmotic energy harvesting potential in challenging real-world hypersaline environments through vermiculite-based hetero-nanochannels," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    2. Shanshan Hong & Maria Vincenzo & Alberto Tiraferri & Erica Bertozzi & Radosław Górecki & Bambar Davaasuren & Xiang Li & Suzana P. Nunes, 2024. "Precision ion separation via self-assembled channels," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    3. Jin Wang & Zeyuan Song & Miaolu He & Yongchao Qian & Di Wang & Zheng Cui & Yuan Feng & Shangzhen Li & Bo Huang & Xiangyu Kong & Jinming Han & Lei Wang, 2024. "Light-responsive and ultrapermeable two-dimensional metal-organic framework membrane for efficient ionic energy harvesting," Nature Communications, Nature, vol. 15(1), pages 1-13, December.
    4. Mengtao Tian & Yi Liu & Shaoze Zhang & Can Yu & Kostya (Ken) Ostrikov & Zhenghua Zhang, 2024. "Overcoming the permeability-selectivity challenge in water purification using two-dimensional cobalt-functionalized vermiculite membrane," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    5. 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.

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