Abstract
Abstract A simple hydrolysis process has been developed to prepare nanosized cupric oxide using cupric acetate as a starting material. In addition, the effects of different pH values varying from 5 to 10 and ultrasonic irradiation on the structure, morphology and optical properties of nanosized CuO samples have been investigated. Samples were characterized using X-ray diffraction, Fourier transform spectroscopy, scanning electron microscopy, transmission electron microscopy and UV–Vis spectroscopy. X-ray diffraction patterns of samples were identical to the single-phase pure CuO with a monoclinic structure. Our results indicated that properties of samples had great dependence on the reaction pH and ultrasonic irradiation. The crystallite size increased with increasing the pH value from 5 to 10. The band gap of samples was estimated to be in the range of 2.0–2.9 eV, which is larger than the reported value for bulk CuO. Synthesized CuO samples with adjustable and controllable optical properties make the applicability of cupric oxide even more versatile.
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