Abstract
Sphere-like Cu-Cu2O nanoparticles on graphene nanoplatelets (Cu-Cu2O@GNP) nanocomposites were prepared via the in situ decomposition of copper acetate and GNP at 500 degrees C in N-2 flow. The thermal behavior of the copper acetate and GNP mixtures was monitored using thermogravimetric analysis (TGA). X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and N-2 adsorption were used to characterize the obtained nanocomposites. The obtained results revealed that the nanocomposites are consisted of Cu-Cu2O nanospheres distributed among the graphene nanoplatelets. The study on the thermal effect of cyclic conductivity was done on Cu-Cu2O@GNP in the pure form, prepared in different copper loadings (5%, 10%, 20% and 30%). The dc conductivity for 5%, 10%, 20% and 30% of Cu-Cu2O@GN composite was found 42.44 S cm(-1), 44.053 S cm(-1), 75.42 S cm(-1) and 78.951 S cm(-1), respectively measured by 4-in line-probe dc electrical conductivity measuring technique. This shows the metallic behavior as it increasing with the temperature and highest ratio of metal have high conductivity. (C) 2018 Elsevier B.V. All rights reserved.