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Lamellar carbon nitride membrane for enhanced ion sieving and water desalination

Membrane-based water treatment processes offer possibility to alleviate the water scarcity dilemma in energy-efficient and sustainable ways, this has been exemplified in filtration membranes assembled from two-dimensional (2D) materials for water desalination purposes. Most representatives however t...

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Autores principales: Wang, Yang, Lian, Tingting, Tarakina, Nadezda V., Yuan, Jiayin, Antonietti, Markus
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9705542/
https://www.ncbi.nlm.nih.gov/pubmed/36443321
http://dx.doi.org/10.1038/s41467-022-35120-9
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author Wang, Yang
Lian, Tingting
Tarakina, Nadezda V.
Yuan, Jiayin
Antonietti, Markus
author_facet Wang, Yang
Lian, Tingting
Tarakina, Nadezda V.
Yuan, Jiayin
Antonietti, Markus
author_sort Wang, Yang
collection PubMed
description Membrane-based water treatment processes offer possibility to alleviate the water scarcity dilemma in energy-efficient and sustainable ways, this has been exemplified in filtration membranes assembled from two-dimensional (2D) materials for water desalination purposes. Most representatives however tend to swell or disintegrate in a hydrated state, making precise ionic or molecular sieving a tough challenge. Here we report that the chemically robust 2D carbon nitride can be activated using aluminum polycations as pillars to modulate the interlayer spacing of the conjugated framework, the noncovalent interaction concomitantly affords a well-interlinked lamellar structure, to be carefully distinguished from random stacking patterns in conventional carbon nitride membranes. The conformally packed membrane is characterized by adaptive subnanochannel and structure integrity to allow excellent swelling resistance, and breaks permeability-selectivity trade-off limit in forward osmosis due to progressively regulated transport passage, achieving high salt rejection (>99.5%) and water flux (6 L m(−2) h(−1)), along with tunable permeation behavior that enables water gating in acidic and alkaline environments. These findings position carbon nitride a rising building block to functionally expand the 2D membrane library for applications in water desalination and purification scenarios.
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spelling pubmed-97055422022-11-30 Lamellar carbon nitride membrane for enhanced ion sieving and water desalination Wang, Yang Lian, Tingting Tarakina, Nadezda V. Yuan, Jiayin Antonietti, Markus Nat Commun Article Membrane-based water treatment processes offer possibility to alleviate the water scarcity dilemma in energy-efficient and sustainable ways, this has been exemplified in filtration membranes assembled from two-dimensional (2D) materials for water desalination purposes. Most representatives however tend to swell or disintegrate in a hydrated state, making precise ionic or molecular sieving a tough challenge. Here we report that the chemically robust 2D carbon nitride can be activated using aluminum polycations as pillars to modulate the interlayer spacing of the conjugated framework, the noncovalent interaction concomitantly affords a well-interlinked lamellar structure, to be carefully distinguished from random stacking patterns in conventional carbon nitride membranes. The conformally packed membrane is characterized by adaptive subnanochannel and structure integrity to allow excellent swelling resistance, and breaks permeability-selectivity trade-off limit in forward osmosis due to progressively regulated transport passage, achieving high salt rejection (>99.5%) and water flux (6 L m(−2) h(−1)), along with tunable permeation behavior that enables water gating in acidic and alkaline environments. These findings position carbon nitride a rising building block to functionally expand the 2D membrane library for applications in water desalination and purification scenarios. Nature Publishing Group UK 2022-11-29 /pmc/articles/PMC9705542/ /pubmed/36443321 http://dx.doi.org/10.1038/s41467-022-35120-9 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Wang, Yang
Lian, Tingting
Tarakina, Nadezda V.
Yuan, Jiayin
Antonietti, Markus
Lamellar carbon nitride membrane for enhanced ion sieving and water desalination
title Lamellar carbon nitride membrane for enhanced ion sieving and water desalination
title_full Lamellar carbon nitride membrane for enhanced ion sieving and water desalination
title_fullStr Lamellar carbon nitride membrane for enhanced ion sieving and water desalination
title_full_unstemmed Lamellar carbon nitride membrane for enhanced ion sieving and water desalination
title_short Lamellar carbon nitride membrane for enhanced ion sieving and water desalination
title_sort lamellar carbon nitride membrane for enhanced ion sieving and water desalination
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9705542/
https://www.ncbi.nlm.nih.gov/pubmed/36443321
http://dx.doi.org/10.1038/s41467-022-35120-9
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