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Persistent URL
http://purl.org/net/epubs/work/54073682
Record Status
Checked
Record Id
54073682
Title
Comparative Study on Magnetism of Reduced Graphene Oxide (rGO) Prepared from Coconut Shells and the Commercial Product
Contributors
R Asih
,
EB Yutomo
,
D Ristiani
,
MA Baqiya
,
T Kawamata
,
M Kato
,
I Watanabe
,
Y Koike
,
D Darminto
Abstract
Magnetism of reduced graphene oxide/rGO prepared by a green synthesis method from coconut shells (rGO-s) and the commercial product (rGO-c, ®Graphenea) have been investigated. Similar magnetic feature of a weak ferromagnetism concomitant with diamagnetic nature was observed in both samples. At 300 K, the saturation magnetization (MS) of rGO-s is approximately 14×10-3 emu/g, which is about 3 times of that observed in rGO-c (~5×10-3 emu/g). The noticeable difference in the MS is suggested due to the different concentration of oxygen-functional groups and other defects presented in the rGO sheets. The samples have similar structure and contains similar functional groups, yet rGO-s contains higher concentration of oxygen-functional groups and defects than rGO-c. A paramagnetic behavior was also indicated at low temperature. This study supports an indication of the defect-induced-magnetism in rGO and confirms that various magnetic features, such as ferromagnetic, diamagnetic and paramagnetic, can coexist in rGO.
Organisation
ISIS
,
ISIS-RIKEN
,
ISIS-MUONS
,
STFC
Keywords
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Language
English (EN)
Type
Details
URI(s)
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Year
Journal Article
Mater Sci Forum
966 (2019): 290-295.
https://doi.org/1…ific.net/MSF.966.290
2019
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