Synthesis of CuO nano- and micro-structures and their Raman spectroscopic studies

Abstract

We report on the synthesis of different CuO nanostructures via a simple solution approach with high yield at low cost by reduction of CuCl₂ aqueous solution with NaOH alkaline solution. The morphology of the CuO nanostructures is significantly influenced by the shape controller surfactant. Belt-, bambooleaf- and shuttle-like CuO nanostructures were synthesized by reduction of CuCl₂ aqueous solution with NaOH alkaline solution in the presence of the surfactant PEG, CTAB and in the absence of surfactant at 75 °C, respectively. The Raman scattering investigations of the as-prepared CuO nanostructures show that the morphology and size of nanostructures have a great effect on the intensity of the two-phonon scattering band (2B_g) (multi-phonon (MP) transition) of the as-prepared CuO nanostructures. A tentative mechanism has been given for the formation of CuO nanostructures with different morphologies.