One-step synthesis of copper nanoparticles embedded in carbon composites

Copper nanoparticles embedded in carbon composites were prepared via spray pyrolysis by adjusting the polyvinylpyrrolidone (PVP) to copper nitrate mass ratio. When the equal amount of two precursors was mixed and spray pyrolyzed, copper nanoparticles with sizes in the range 30–50 nm were incorporated into the carbon composites arising from PVP. X-ray photoelectron spectroscopy demonstrated that the copper nanoparticles exhibit oxidation resistance. In addition, the effects of carbon on the surface plasmon bands were investigated. This synthetic process is simple and environmentally friendly and reduces the problems associated with their oxidation through one-step passivation.

Copper nanoparticles of 30–50 nm were incorporated in carbon composites when the same mass of PVP was added in precursor solution while the concentration of copper nitrates was fixed. XPS results demonstrated that copper nanoparticles were effectively protected from oxidation.Figure optionsDownload as PowerPoint slideHighlights
► Cu/carbon composites were prepared by one-step spray pyrolysis.
► Morphological changes of powders were shown by varying the PVP to Cu salt ratio.
► Carbon played an important role in improving air-stability of Cu nanoparticles.
► The surface plasmon band of Cu/C composites was shifted toward high wavelengths.