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Highly Water-Dispersible Graphene Nanosheets From Electrochemical Exfoliation of Graphite
The electrochemical exfoliation of graphite has been considered to be an effective approach for the mass production of high-quality graphene due to its easy, simple, and eco-friendly synthetic features. However, water dispersion of graphene produced in the electrochemical exfoliation method has also...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8335538/ https://www.ncbi.nlm.nih.gov/pubmed/34368080 http://dx.doi.org/10.3389/fchem.2021.699231 |
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author | Park, Si-Woo Jang, Byungkwon Kim, Han Lee, Jimin Park, Ji Young Kang, Sung-Oong Choa, Yong-Ho |
author_facet | Park, Si-Woo Jang, Byungkwon Kim, Han Lee, Jimin Park, Ji Young Kang, Sung-Oong Choa, Yong-Ho |
author_sort | Park, Si-Woo |
collection | PubMed |
description | The electrochemical exfoliation of graphite has been considered to be an effective approach for the mass production of high-quality graphene due to its easy, simple, and eco-friendly synthetic features. However, water dispersion of graphene produced in the electrochemical exfoliation method has also been a challenging issue because of the hydrophobic properties of the resulting graphene. In this study, we report the electrochemical exfoliation method of producing water-dispersible graphene that importantly contains the relatively low oxygen content of <10% without any assistant dispersing agents. Through the mild in situ sulfate functionalization of graphite under alkaline electrochemical conditions using a pH buffer, the highly water-dispersible graphene could be produced without any additional separation processes of sedimentation and/or centrifugation. We found the resulting graphene sheets to have high crystalline basal planes, lateral sizes of several μm, and a thickness of <5 nm. Furthermore, the high aqueous dispersion stability of as-prepared graphene could be demonstrated using a multi-light scattering technique, showing very little change in the optical transmittance and the terbiscan stability index over time. |
format | Online Article Text |
id | pubmed-8335538 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-83355382021-08-05 Highly Water-Dispersible Graphene Nanosheets From Electrochemical Exfoliation of Graphite Park, Si-Woo Jang, Byungkwon Kim, Han Lee, Jimin Park, Ji Young Kang, Sung-Oong Choa, Yong-Ho Front Chem Chemistry The electrochemical exfoliation of graphite has been considered to be an effective approach for the mass production of high-quality graphene due to its easy, simple, and eco-friendly synthetic features. However, water dispersion of graphene produced in the electrochemical exfoliation method has also been a challenging issue because of the hydrophobic properties of the resulting graphene. In this study, we report the electrochemical exfoliation method of producing water-dispersible graphene that importantly contains the relatively low oxygen content of <10% without any assistant dispersing agents. Through the mild in situ sulfate functionalization of graphite under alkaline electrochemical conditions using a pH buffer, the highly water-dispersible graphene could be produced without any additional separation processes of sedimentation and/or centrifugation. We found the resulting graphene sheets to have high crystalline basal planes, lateral sizes of several μm, and a thickness of <5 nm. Furthermore, the high aqueous dispersion stability of as-prepared graphene could be demonstrated using a multi-light scattering technique, showing very little change in the optical transmittance and the terbiscan stability index over time. Frontiers Media S.A. 2021-07-21 /pmc/articles/PMC8335538/ /pubmed/34368080 http://dx.doi.org/10.3389/fchem.2021.699231 Text en Copyright © 2021 Park, Jang, Kim, Lee, Park, Kang and Choa. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Chemistry Park, Si-Woo Jang, Byungkwon Kim, Han Lee, Jimin Park, Ji Young Kang, Sung-Oong Choa, Yong-Ho Highly Water-Dispersible Graphene Nanosheets From Electrochemical Exfoliation of Graphite |
title | Highly Water-Dispersible Graphene Nanosheets From Electrochemical Exfoliation of Graphite |
title_full | Highly Water-Dispersible Graphene Nanosheets From Electrochemical Exfoliation of Graphite |
title_fullStr | Highly Water-Dispersible Graphene Nanosheets From Electrochemical Exfoliation of Graphite |
title_full_unstemmed | Highly Water-Dispersible Graphene Nanosheets From Electrochemical Exfoliation of Graphite |
title_short | Highly Water-Dispersible Graphene Nanosheets From Electrochemical Exfoliation of Graphite |
title_sort | highly water-dispersible graphene nanosheets from electrochemical exfoliation of graphite |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8335538/ https://www.ncbi.nlm.nih.gov/pubmed/34368080 http://dx.doi.org/10.3389/fchem.2021.699231 |
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