Development of highly faceted reduced graphene oxide-coated copper oxide and copper nanoparticles on a copper foil surface

Abstract

SummaryThis work describes the formation of reduced graphene oxide-coated copper oxide and copper nanoparticles (rGO-Cu2ONPs, rGO-CuNPs) on the surface of a copper foil supporting graphene oxide (GO) at annealing temperatures of 200–1000 °C, under an Ar atmosphere. These hybrid nanostructures were developed from bare copper oxide nanoparticles which grew at an annealing temperature of 80 °C under nitrogen flux. The predominant phase as well as the particle size and shape strongly depend on the process temperature. Characterization with transmission electron microscopy and scanning electron microscopy indicates that Cu or Cu2O nanoparticles take rGO sheets from the rGO network to form core–shell Cu–rGO or Cu2O–rGO nanostructures. It is noted that such ones increase in size from 5 to 800 nm as the annealing temperature increases in the 200–1000 °C range. At 1000 °C, Cu nanoparticles develop a highly faceted morphology, displaying arm-like carbon nanorods that originate from different facets of the copper crystal structure.

Cu2O nanoparticles for the degradation of methyl parathion

“…Consequently, both 16 nm and 29 nm NPs have a similar active surface size and the degradation percentage of MP is similar between 16 nm Cu 2 O (87%) and 29 nm Cu 2 O (83%). In order to avoid oxidation of Cu 2 O NPs, reduced graphene oxide (rGO) can be used as a support [ 54 ]. Finally, XPS spectra of S 2p and P 2p were also obtained before and after the degradation.…”

Modulation of Oxygen Content in Graphene Surfaces Using Temperature-Programmed Reductive Annealing: Electron Paramagnetic Resonance and Electrochemical Study

“…They investigated the effects on rGO for a short-annealing duration and temperatures up to 850 °C. Ortega-Amaya and Tu et al , annealed GO in tube furnaces up to 1000 °C but under inert Ar atmospheres (Ar or N 2 ).…”

N-Graphene Sheet Stacks/Cu Electrocatalyst for CO2 Reduction to Ethylene

“…Chemical deposition of Cu nanocrystals onto GSS was performed reducing Cu 2+ simultaneously with non-reduced GSS in aqueous hydrazine (N 2 H 4 ) solution (modified setup from [25]). For hydrazine reduced Cu on GSS we used CuSO 4 solution as a Cu source.…”