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Magnetite-functionalized graphene nanohybrids: Preparation and characterization of electrical and magnetic property

journal contribution
posted on 31.03.2021, 05:45 by Yau Thim Ng, Kong Wei, Ing Kong
© 2018 Elsevier Ltd. In this work, magnetite (Fe3O4)-graphene hybrid nanocomposites were successfully synthesized through a facile in-situ deposition using expandable graphite as the graphene precursor. The expandable graphite firstly underwent a rapid thermal expansion into expanded graphite (EG). Then, ultrasonication was used to further exfoliate the EG into graphene sheets. In the presence of graphene, iron (II) and iron (III) chlorides were precipitated, which resulted in the formation of the Fe3O4-graphene hybrids. Scanning electron microscopy, X-ray diffraction, thermogravimetry analysis and Fourier transform infrared spectroscopy were employed to validate the preparation method. Results showed that the electrical conductivity of the hybrid samples decreased with increasing Fe3O4 loading. In addition, the magnetization measurements of the Fe3O4-graphene hybrids showed that they exhibit superparamagnetic effect at room temperature with MS values of up to 47.8 emu·g-1.

Funding

The authors gratefully acknowledge the financial support of this work by the Ministry of Higher Education (MOHE) Malaysia via Exploratory Research Grant Scheme, ERGS/1/2013/TK04/UNIM/03/01, and MyBrain 15 (My PhD) as well as Centre for Research and Instrumentation Management (CRIM) of Universiti Kebangsaan Malaysia (UKM) for their assistance.

History

Publication Date

01/01/2018

Journal

Materials Today: Proceedings

Volume

5

Issue

1

Pagination

9p. (p. 3202-3210)

Publisher

Elsevier

ISSN

2214-7853

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