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Correlation between defect density in mechanically milled graphite and total oxygen content of graphene oxide produced from oxidizing the milled graphite

Mohanta, Zinia and Atreya, Hanudatta S and Srivastava, Chandan (2018) Correlation between defect density in mechanically milled graphite and total oxygen content of graphene oxide produced from oxidizing the milled graphite. In: SCIENTIFIC REPORTS, 8 .

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Official URL: http://dx.doi.org/10.1038/s41598-018-34109-z

Abstract

It has been reported that defect density in ball-milled graphite lattice increases with the milling time. Guided by this, we hypothesized that the oxygen content of graphene oxide can be substantially enhanced by oxidizing ball-milled graphite and also, the oxygen content would monotonically increase with the milling time as the defect sites would be preferred sites for oxidation. Interestingly, we observed that this correlation was not directly proportional for all milling hours. Even though, the defect density of graphite monotonically increased with milling time, the oxygen content of graphene oxide initially increased and then decreased. This was due to milling time dependent change in the size of the graphite plates and consequent relative abundance of the different oxygen containing functional groups on graphene oxide (GO) produced from the milled graphite.

Item Type: Journal Article
Additional Information: Copy right for this article belong to NATURE PUBLISHING GROUP
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Interdisciplinary Research > Centre for Biosystems Science and Engineering
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 13 Nov 2018 15:25
Last Modified: 13 Nov 2018 15:25
URI: http://eprints.iisc.ac.in/id/eprint/61040

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