Optical, Structural, Morphological Properties of Chromium (III) Oxide Nanostructure Synthesized Using Spray Pyrolysis Technique

Abstract

Nanostructure of chromium oxide (Cr2O3-NPs) withrhombohedral structure were successfully prepared by spray pyrolysistechnique using Aqueous solution of Chromium (III) chloride CrCl3as solution. The films were deposited on glass substrates heated to 450°C using X-ray diffraction (XRD) shows the nature of polycrystallinesamples. The calculated lattice constant value for the grown Cr2O3nanostructures is a = b = 4.959 Å & c = 13.594 Å and the averagecrystallize size (46.3-55.6) nm calculated from diffraction peaks,Spectral analysis revealed FTIR peak characteristic vibrations ofCr-O Extended and Two sharp peaks present at 630 and 578 cm-1attributed to Cr-O “stretching modes”, are clear evidence of thepresence of crystalline Cr2O3. The energy band gap (3.4 eV) for thechromium oxide nanostructures was measured using the UV-VIS-NIROptical Spectrophotometer. It was found that by scanning electronmicroscopy (SEM) and image results, there is a large amount ofnanostructure with an average crystal size of 46.3-55.6 nm, whichindicates that our synthesis process is a successful method forpreparing Cr2O3 nanoparticles.