Comparative study on magnetism of reduced graphene oxide (Rgo) prepared from coconut shells and the commercial product

Retno Asih, Erik Bhekti Yutomo, Deril Ristiani, Malik Anjelh Baqiya, Takayuki Kawamata, Masatsune Kato, Isao Watanabe, Yoji Koike, Darminto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

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.

Original languageEnglish
Title of host publicationFunctional Properties of Modern Materials II
Editors Darminto, Budhy Kurniawan, Risdiana, Isao Watanabe, Agustinus Agung Nugroho
PublisherTrans Tech Publications Ltd
Pages290-295
Number of pages6
ISBN (Print)9783035714968
DOIs
Publication statusPublished - 2019
Event4th International Conference on Functional Materials Science, ICFMS 2018 - Bali, Indonesia
Duration: 2018 Nov 132018 Nov 15

Publication series

NameMaterials Science Forum
Volume966 MSF
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference4th International Conference on Functional Materials Science, ICFMS 2018
CountryIndonesia
CityBali
Period18/11/1318/11/15

Keywords

  • Coconut shells
  • Defect
  • Magnetic hysteresis
  • Magnetization
  • Reduced graphene oxide

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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