Title: Preparation and characterisation of graphene oxide nanofluid and its electrical conductivity

Authors: Md. Arifur Rahman; Md. Abu Naser Shatez; K. Yamun Nahar Ritee; Papia Yasmin; Md. Shahadat Hossain; Md. Zaved H. Khan

Addresses: Department of Chemical Engineering, Jessore University of Science and Technology, Jessore 7408, Bangladesh ' Department of Chemical Engineering, Jessore University of Science and Technology, Jessore 7408, Bangladesh ' Department of Chemical Engineering, Jessore University of Science and Technology, Jessore 7408, Bangladesh ' Department of Chemical Engineering, Jessore University of Science and Technology, Jessore 7408, Bangladesh ' Department of Chemistry, Government M.M. College, Jessore, Bangladesh ' Department of Chemical Engineering, Jessore University of Science and Technology, Jessore 7408, Bangladesh

Abstract: Recently, two dimensional honeycomb lattice structural graphene grants unique properties that are currently being pursued for conductive composites, advanced electronics, membranes, etc. In this work, we report the preparation of graphene oxides (GO) nanofluids by dispersion of GO nanosheets in base fluid. Firstly, GO sheets were synthesised in controlled size using improved Hummer method by simply oxidation and facile exfoliation procedure. As prepared samples are characterised by UV-vis spectrometer, Fourier transform infrared spectroscopy (FTIR) spectrometer, scanning electron microscopy (SEM) and X-ray powder diffraction (XRD). The XRD pattern revels that GO were form in nanoscale with crystalline structure. SEM image confirmed that GO were form in ultra small sheet state with smooth surface. UV-vis absorption spectrum reveals that GO nanosheets disperse well in the base fluid. FTIR result reveals the presence of functional group in the lattice which helps the graphene oxide sheets to interact with water molecules and good dispersion. In terminology of electrical conductivity, the result suggests that the samples with 0.1% volume of GO had the highest conductivity with the value of 5,310 μS/cm.

Keywords: graphene oxide; GO; nanofluids; electrical conductivity; crystalline structure; nanosheets.

DOI: 10.1504/IJNBM.2017.090125

International Journal of Nano and Biomaterials, 2017 Vol.7 No.2, pp.102 - 112

Received: 24 Jul 2017
Accepted: 02 Oct 2017
Published online: 28 Feb 2018 *

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