Hesperidin mediated synthesis, structure and optical emission analysis on nanocrystalline CuO

Abstract

Abstract Nanocrystalline Copper (II) oxide was synthesized through hesperidin mediated phytochemical reduction method and post annealed at 600 °C for 4 hrs. Various analytical results obtained after characteristic measurements such as XRD, FESEM, UV–visible spectroscopy and Photoluminescence studies have been discussed. The crystallographic plane reflections obtained in X-ray diffraction pattern was found to be analogous with the monoclinic end centered phase of copper (II) oxide with Halder-Wagner crystallite size 18 nm. The formation of spherical grains via agglomerated crystallites was apparent from the surface morphology obtained through FESEM images. Tauc’ plot of UV–visible spectrum employing Kubelka-Munk function provided a direct optical band gap of 1.61 eV. The photoluminescence spectrum using 280 nm optimal excitation wavelength and the related CIE plot revealed that the optical emission occurs at blue region as indicated by the chromaticity coordinates.