Effect of reaction time on structural, morphological, optical and photocatalytic properties of copper oxide (CuO) nanostructures

Authors: Vinothkumar P., Manoharan C., Shanmugapriya B., Bououdina M.

Author Affiliations: Vinothkumar, P., Department of Physics, Annamalai University, Annamalai Nagar, Chidambaram, Tamilnadu 608 002, India; Manoharan, C., Department of Physics, Annamalai University, Annamalai Nagar, Chidambaram, Tamilnadu 608 002, India; Shanmugapriya, B., Department of Physics, Annamalai University, Annamalai Nagar, Chidambaram, Tamilnadu 608 002, India; Bououdina, M., Department of Physics, College of Science, University of Bahrain, PO Box 32038, Zallaq, Southern Governorate, Bahrain

Publication Date: 2019

Spindle-like CuO nanostructure had been synthesized by facile hydrothermal method at low temperature of 100 °C. The influence of reaction time on the evolution of structure, morphology, optical and photocatalytic properties was investigated. X-ray diffraction analysis revealed the monoclinic phase. HR-SEM and TEM analyses evidenced morphological transformation with reaction time. XPS analysis revealed the composition and elemental state of CuO nanoparticles. The optical properties analysed by UV-absorption spectroscopy indicated that the band gap varied slightly within the range 3.43–3.56 eV. Photoluminescence spectra displayed violet, blue and green emissions for all synthesized nanostructures. The as-synthesized CuO nanostructures were effectively used to degrade methylene blue (MB) dye under UV-light irradiation; reaching a maximum efficiency of 85% for 12 h. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.

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Eshan2020-11-28T18:53:20+00:00

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