Preparation and characterization of chromium oxide nanoparticles
Asma Almontasser, Azra Parveen
Abstract
The metal oxide nanoparticles represent a wide class of materials that have been studied largely due to their fascinating catalytic, optical, magnetic, electronic, and medicinal properties. Chromium oxide (Cr2O3) has attracted great attention because of its significance in science as well as in technology. This paper reports the optical properties of (Cr2O3) nanopowder by using the sol-gel method. The structural and morphological analyses of Cr2O3 have been carried out by X-ray diffraction (XRD) methods and field-emission scanning electron microscopy (FESEM). The XRD pattern showed the formation of the rhombohedral lattice of Cr2O3 nanostructure with a high degree of purity. Debye-Scherrer formula provided the information about the crystallite size (D). UV-Vis spectroscopy was utilized to determine the optical properties of the sample. The estimated band gap of Cr2O3 nanopowder was found to be 3.87eV. Photoluminescence spectroscopy (PL) shown the spectrum of Cr2O3.