Thermal decompose method for synthesis and characterization of CoO2/GrO nanostructures and optical investigation

Abstract

In this study, a novel solvent-less processing route for producing CoO2/GrO nanostructures by solid-state thermal decomposition has been developed. Cobalt(II) acetate nanostructures obtained by the sublimation of cobalt(II) acetate powder have been used as a new starting reagent. The sublimation process of the Co(C2H3O2)2·4 H2O powder was carried out in 300 °C. The as-synthesized products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, atomic force microscopy and photoluminescence (PL) spectroscopy. Then effect of sublimation temperature on morphology of Co(C2H3O2)2·4 H2O nanoparticles and consequently on the CoO2/GrO nanoparticles was investigated. The results indicated that the synthesized CoO2/GrO nanostructures have a pure crystality structure with average size 60–90 nm. Finally, the efficiency of CoO2/GrO nanostructures as a optical investigation using PL spectrum has been evaluated.