Abstract
Nanostructure of chromium oxide (Cr2O3-NPs) with rhombohedral structure were successfully prepared by spray pyrolysis technique using Aqueous solution of Chromium (III) chloride CrCl3 as solution. The films were deposited on glass substrates heated to 450°C using X-ray diffraction (XRD) shows the nature of polycrystalline samples. The calculated lattice constant value for the grown Cr2O3 nanostructures is a = b = 4.959 Å & c = 13.594 Å and the average crystallize size (46.3-55.6) nm calculated from diffraction peaks, Spectral analysis revealed FTIR peak characteristic vibrations of Cr-O Extended and Two sharp peaks present at 630 and 578 cm-1 attributed to Cr-O “stretching modes”, are clear evidence of the presence of crystalline Cr2O3. The energy band gap (3.4 eV) for the chromium oxide nanostructures was measured using the UV-VIS-NIR Optical Spectrophotometer. It was found that by scanning electron microscopy (SEM) and image results, there is a large amount of nanostructure with an average crystal size of 46.3-55.6 nm, which indicates that our synthesis process is a successful method for preparing Cr2O3 nanoparticles.
Highlights
The study of microstructure and nanostructure has received increasing attention because of the new properties that materials may exhibit when reducing grain size [1]
Various techniques were developed for the assembly of Cr2O3 nanostructure such as hydrothermal [15], Solid pyrolysis [16], combustion [17], sol-gel [18], precipitation gelation [19], oxidation chromium [20], laser-induced deposition [21], mechanochemical reaction and subsequent heat Treatment [22], and "sonochemical methods" ]23[
The surface properties, size, morphology and crystallographic structure of Cr2O3 particles are characterized by means of X-ray diffraction (XRD), and scanning electron microscope (SEM) which will give much valuable information about these materials
Summary
The study of microstructure and nanostructure has received increasing attention because of the new properties that materials may exhibit when reducing grain size [1]. 1. Introduction The study of microstructure and nanostructure has received increasing attention because of the new properties that materials may exhibit when reducing grain size [1]. Nanostructure of metal oxides can have unique chemical properties due to their specific size and high density of edge surface locations [3,4].
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