Abstract
Abstract Black red cauliflower-like microstructure films were synthesized by immersing copper foils in deionized water and ethanol component solvent (Vdeionized water: Vethanol = 1:1) solution of ammonia (DIWECSSA) at low temperature (0 − 25 °C). The samples were characterized by SEM, EDX, XRD and TEM. Results showed that the black red film synthesized in 0.03 M DIWECSSA at 25 °C for 4 h had novel cauliflower-like microstructures and was made up of monoclinic CuO, tetragonal 6CuO·Cu2O and cubic Cu2+1O. It was quite distinct from the previously reported blue orthorhombic Cu(OH)2 nanoribbons synthesized by immersing copper foils in either ethanol or aqueous solution of ammonia. And it was found that the ammonia only played a role in accelerating the oxidation of copper in the reaction system of copper foil and the DIWECSSA.
Published Version
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