Highly Water-Dispersible Graphene Nanosheets From Electrochemical Exfoliation of Graphite
- Title
- Highly Water-Dispersible Graphene Nanosheets From Electrochemical Exfoliation of Graphite
- Author
- 좌용호
- Keywords
- graphene; water dispersion; sulfate functionalization; electrochemical exfoliation; edge functionalization; Chemistry; QD1-999
- Issue Date
- 2021-07
- Publisher
- FRONTIERS MEDIA SA
- Citation
- FRONTIERS IN CHEMISTRY, v. 9, Page. 1-8
- Abstract
- 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 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 mu m, 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.
- URI
- https://doaj.org/article/ddd688888d20420ab1966c44fb859aa0https://repository.hanyang.ac.kr/handle/20.500.11754/172511
- ISSN
- 2296-2646
- DOI
- 10.3389/fchem.2021.699231
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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