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Unidirectional ion transport in nanoporous carbon membranes with a hierarchical pore architecture
The transport of fluids in channels with diameter of 1-2 nm exhibits many anomalous features due to the interplay of several genuinely interfacial effects. Quasi-unidirectional ion transport, reminiscent of the behavior of membrane pores in biological cells, is one phenomenon that has attracted a lo...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8324873/ https://www.ncbi.nlm.nih.gov/pubmed/34330921 http://dx.doi.org/10.1038/s41467-021-24947-3 |
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author | Chen, Lu Tu, Bin Lu, Xubin Li, Fan Jiang, Lei Antonietti, Markus Xiao, Kai |
author_facet | Chen, Lu Tu, Bin Lu, Xubin Li, Fan Jiang, Lei Antonietti, Markus Xiao, Kai |
author_sort | Chen, Lu |
collection | PubMed |
description | The transport of fluids in channels with diameter of 1-2 nm exhibits many anomalous features due to the interplay of several genuinely interfacial effects. Quasi-unidirectional ion transport, reminiscent of the behavior of membrane pores in biological cells, is one phenomenon that has attracted a lot of attention in recent years, e.g., for realizing diodes for ion-conduction based electronics. Although ion rectification has been demonstrated in many asymmetric artificial nanopores, it always fails in the high-concentration range, and operates in either acidic or alkaline electrolytes but never over the whole pH range. Here we report a hierarchical pore architecture carbon membrane with a pore size gradient from 60 nm to 1.4 nm, which enables high ionic rectification ratios up to 10(4) in different environments including high concentration neutral (3 M KCl), acidic (1 M HCl), and alkaline (1 M NaOH) electrolytes, resulting from the asymmetric energy barriers for ions transport in two directions. Additionally, light irradiation as an external energy source can reduce the energy barriers to promote ions transport bidirectionally. The anomalous ion transport together with the robust nanoporous carbon structure may find applications in membrane filtration, water desalination, and fuel cell membranes. |
format | Online Article Text |
id | pubmed-8324873 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-83248732021-08-19 Unidirectional ion transport in nanoporous carbon membranes with a hierarchical pore architecture Chen, Lu Tu, Bin Lu, Xubin Li, Fan Jiang, Lei Antonietti, Markus Xiao, Kai Nat Commun Article The transport of fluids in channels with diameter of 1-2 nm exhibits many anomalous features due to the interplay of several genuinely interfacial effects. Quasi-unidirectional ion transport, reminiscent of the behavior of membrane pores in biological cells, is one phenomenon that has attracted a lot of attention in recent years, e.g., for realizing diodes for ion-conduction based electronics. Although ion rectification has been demonstrated in many asymmetric artificial nanopores, it always fails in the high-concentration range, and operates in either acidic or alkaline electrolytes but never over the whole pH range. Here we report a hierarchical pore architecture carbon membrane with a pore size gradient from 60 nm to 1.4 nm, which enables high ionic rectification ratios up to 10(4) in different environments including high concentration neutral (3 M KCl), acidic (1 M HCl), and alkaline (1 M NaOH) electrolytes, resulting from the asymmetric energy barriers for ions transport in two directions. Additionally, light irradiation as an external energy source can reduce the energy barriers to promote ions transport bidirectionally. The anomalous ion transport together with the robust nanoporous carbon structure may find applications in membrane filtration, water desalination, and fuel cell membranes. Nature Publishing Group UK 2021-07-30 /pmc/articles/PMC8324873/ /pubmed/34330921 http://dx.doi.org/10.1038/s41467-021-24947-3 Text en © The Author(s) 2021 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 Chen, Lu Tu, Bin Lu, Xubin Li, Fan Jiang, Lei Antonietti, Markus Xiao, Kai Unidirectional ion transport in nanoporous carbon membranes with a hierarchical pore architecture |
title | Unidirectional ion transport in nanoporous carbon membranes with a hierarchical pore architecture |
title_full | Unidirectional ion transport in nanoporous carbon membranes with a hierarchical pore architecture |
title_fullStr | Unidirectional ion transport in nanoporous carbon membranes with a hierarchical pore architecture |
title_full_unstemmed | Unidirectional ion transport in nanoporous carbon membranes with a hierarchical pore architecture |
title_short | Unidirectional ion transport in nanoporous carbon membranes with a hierarchical pore architecture |
title_sort | unidirectional ion transport in nanoporous carbon membranes with a hierarchical pore architecture |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8324873/ https://www.ncbi.nlm.nih.gov/pubmed/34330921 http://dx.doi.org/10.1038/s41467-021-24947-3 |
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