In this research work, graphene oxide (GO) nanomaterial was synthesized by
using an improved synthesis method and deionized (DI) water is used as base fluid. The
X-ray diffraction (XRD) analysis, Raman spectroscopy, scanning electron microscope
(SEM) imaging, and Ultraviolet-visible (UV-Vis) spectroscopy were used to study
characterization and morphology structure of GO. The three different nanofluid
volumetric concentrations of 0.001%, 0.002% and 0.003% were prepared and the
stability of nanofluid samples was evaluated by the zeta potential analysis method. The
zeta potential analysis results revealed that the prepared nanofluid samples were stable
for up to 30 days with no obvious sedimentation. This study experimentally investigates
the effects of temperature variation and different nanofluid samples on the thermal
conductivity GO/DI nanofluid. The findings of experimental study demonstrated that the
thermal conductivity of GO/DI nanofluid increases with increase in the temperature and
nanofluid concentrations. The maximum increment in thermal conductivity of nanofluid
was obtained to be 25.15% at 40 0 C for 0.003% volumetric concentration as compared to
water.