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Exfoliation of metal-organic framework nanosheets using surface acoustic waves
Two-dimensional (2D) metal–organic framework (MOF) nanosheets have recently received extensive attention due to their ultra-thin thickness, large specific surface area, chemical and functional designability. In this study, an unconventional method using surface acoustic wave (SAW) technology is prop...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8844814/ https://www.ncbi.nlm.nih.gov/pubmed/35144193 http://dx.doi.org/10.1016/j.ultsonch.2022.105943 |
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author | Liu, Xia Jia, Qinxiang Fu, Yongqing Zheng, Tengfei |
author_facet | Liu, Xia Jia, Qinxiang Fu, Yongqing Zheng, Tengfei |
author_sort | Liu, Xia |
collection | PubMed |
description | Two-dimensional (2D) metal–organic framework (MOF) nanosheets have recently received extensive attention due to their ultra-thin thickness, large specific surface area, chemical and functional designability. In this study, an unconventional method using surface acoustic wave (SAW) technology is proposed to exfoliate large quantities and uniform layers of 2D MOF-Zn(2)(bim)(4) nanosheets in a microfluidic system. We successfully demonstrated that the thickness of 2D MOF is effectively and accurately controlled by optimizing the SAW parameters. The mechanisms for the efficient exfoliation of 2D MOF nanosheets is attributed to both the electric and acoustic fields generated by the SAWs in the liquid. The electric field ionizes the methanol to produce H(+) ions, which intercalate Zn(2)(bim)(4) sheets and weaken the interlayer bonding, and the strong shear force generated by SAWs separates the MOF sheets. A yield of 66% for monolayer MOFs with a maximum size of 3.5 μm is achieved under the combined effect of electric and acoustic fields. This fast, low-energy exfoliation platform has the potential to provide a simple and scalable microfluidic exfoliation method for production of large-area and quantities of 2D MOFs. |
format | Online Article Text |
id | pubmed-8844814 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-88448142022-02-22 Exfoliation of metal-organic framework nanosheets using surface acoustic waves Liu, Xia Jia, Qinxiang Fu, Yongqing Zheng, Tengfei Ultrason Sonochem Short Communication Two-dimensional (2D) metal–organic framework (MOF) nanosheets have recently received extensive attention due to their ultra-thin thickness, large specific surface area, chemical and functional designability. In this study, an unconventional method using surface acoustic wave (SAW) technology is proposed to exfoliate large quantities and uniform layers of 2D MOF-Zn(2)(bim)(4) nanosheets in a microfluidic system. We successfully demonstrated that the thickness of 2D MOF is effectively and accurately controlled by optimizing the SAW parameters. The mechanisms for the efficient exfoliation of 2D MOF nanosheets is attributed to both the electric and acoustic fields generated by the SAWs in the liquid. The electric field ionizes the methanol to produce H(+) ions, which intercalate Zn(2)(bim)(4) sheets and weaken the interlayer bonding, and the strong shear force generated by SAWs separates the MOF sheets. A yield of 66% for monolayer MOFs with a maximum size of 3.5 μm is achieved under the combined effect of electric and acoustic fields. This fast, low-energy exfoliation platform has the potential to provide a simple and scalable microfluidic exfoliation method for production of large-area and quantities of 2D MOFs. Elsevier 2022-02-02 /pmc/articles/PMC8844814/ /pubmed/35144193 http://dx.doi.org/10.1016/j.ultsonch.2022.105943 Text en © 2022 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Short Communication Liu, Xia Jia, Qinxiang Fu, Yongqing Zheng, Tengfei Exfoliation of metal-organic framework nanosheets using surface acoustic waves |
title | Exfoliation of metal-organic framework nanosheets using surface acoustic waves |
title_full | Exfoliation of metal-organic framework nanosheets using surface acoustic waves |
title_fullStr | Exfoliation of metal-organic framework nanosheets using surface acoustic waves |
title_full_unstemmed | Exfoliation of metal-organic framework nanosheets using surface acoustic waves |
title_short | Exfoliation of metal-organic framework nanosheets using surface acoustic waves |
title_sort | exfoliation of metal-organic framework nanosheets using surface acoustic waves |
topic | Short Communication |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8844814/ https://www.ncbi.nlm.nih.gov/pubmed/35144193 http://dx.doi.org/10.1016/j.ultsonch.2022.105943 |
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