Morphological evolution of bilayer-structured copper oxide from ribbon-like-structured copper acetate hydroxide with varying growth temperatures

Author(s) Kim, K.Ho; Kanamaru, Y.; Abe, Y.; Kawamura, M.; Kiba, T.
Journal Materials Letters
Date Published 01/2020
Abstract We investigated the optical, morphological, and electrochemical characteristics of nanostructured samples that were directly prepared on fluorine doped tin oxide (FTO) by a simple wet-chemical method with an aqueous solution of copper acetate monohydrate, at different growth temperatures. At room temperature, the nanostructured sample exhibited ribbon-like structures composed of sheets. With increasing temperature (40 °C), it had mixed crystalline phases of ribbon-like-structured copper carbonate hydroxide (Cu2CO3(OH)2) and sphere-like-structured copper oxide (CuO). With a further increase in the growth temperature to 50 °C, a bilayer-structured CuO sample was obtained, that comprised a bottom layer with compact nanoparticles and a top layer with sphere-like structures. The bilayer-structured CuO sample had excellent UV–Vis. light filtration efficiency. In addition, the entirely binder-free CuO sample grown at 60 °C exhibited a specific capacitance of ~23 F/g at a scan rate of 2 mV/s with good rate capability.
DOI 10.1016/j.matlet.2020.127424
ISSN 0167-577X
Citation Materials Letters. 2020;256(127424).

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