Preparation and characterisation of graphene oxide nanofluid and its electrical conductivity
by Md. Arifur Rahman; Md. Abu Naser Shatez; K. Yamun Nahar Ritee; Papia Yasmin; Md. Shahadat Hossain; Md. Zaved H. Khan
International Journal of Nano and Biomaterials (IJNBM), Vol. 7, No. 2, 2017

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.

Online publication date: Wed, 28-Feb-2018

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