Experimental investigation of the thermal transport properties of graphene oxide/Co3O4 hybrid nanofluids
authors Sundar, LS; Singh, MK; Ferro, MC; Sousa, ACM
nationality International
journal INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
author keywords In-situ method; Hybrid nanoparticles; Nanofluids; Thermal conductivity; Viscosity Enhancement
keywords GLYCOL-BASED NANOFLUIDS; HEAT-TRANSFER; CONDUCTIVITY ENHANCEMENT; VISCOSITY; OXIDE; AL2O3; NANOCOMPOSITE; NANOPARTICLES; TEMPERATURE; SUSPENSIONS
abstract The in situ growth and chemical co-precipitation method was used for the synthesis of uniform dispersion of Co3O4 nanoparticles on the graphene oxide (GO) nanosheet. The reductions of aqueous cobalt chloride in the presence of GO with sodium borohydrate result in the formation of hybrid GO/Co3O4 nanoparticles. The synthesized GO/Co3O4 nanoparticles were characterized using X-ray power diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The hybrid nanofluids were prepared by dispersing synthesized GO/Co3O4 nanoparticles in water, ethylene glycol, and ethylene glycol/water mixtures. The properties such as thermal conductivity and viscosity were estimated experimentally at different volume concentrations and temperatures. The thermal conductivity enhancement of water based nanofluid is 19.14% and ethylene glycol based nanofluid is 11.85% at 0.2% volume concentration and at a temperature of 60 degrees C respectively compared to their respective base fluids. Similarly, the viscosity enhancement of water based nanofluid is 1.70-times and ethylene glycol based nanofluid is 1.42-times at 0.2% volume concentration and at a temperature of 60 degrees C respectively. The obtained thermal conductivity and viscosity data is compared with the literature values. (C) 2017 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0735-1933
isbn 1879-0178
year published 2017
volume 84
beginning page 1
ending page 10
digital object identifier (doi) 10.1016/j.icheatmasstransfer.2017.03.001
web of science category Thermodynamics; Mechanics
subject category Thermodynamics; Mechanics
unique article identifier WOS:000403625900001
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journal analysis (jcr 2017):
journal impact factor 4.463
5 year journal impact factor 4.113
category normalized journal impact factor percentile 93.287
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