Publication Details
Abstract
Nanocomposites have applications in various fields. Hence, the possibility of developing its optical properties. In this work, flexible films were prepared by casting method using polymer matrix of “Poly Ethylene Oxide (PEO) “and “Poly Vinyl Alcohol ( PVA)” and with various concentrations of Chromium oxide (Cr2O3) nanoparticles(NPs) as the filler. The spectral properties of the synthesized films were Checked by "Fourier transform infrared (FTIR)", X-ray diffractometry analysis (XRD), and "UV/Vis" for morphological ,structural, and optical features. XRD analysis shows that the PVA/PEO/Cr2O3 nanocomposite films are semicrystalline, and that the degree of crystallization increases, in addition to the appearance of new peaks after loading nanoparticles of Cr2O3. FTIR spectroscopy confirmed the presence of complex compounds in the polymer mixture after the introduction of Cr2O₃ nanoparticles. Also, deviation in the locations of the existing bands , development of new peaks, in addition to the changes that occurred in the intensity of the infrared absorption bands, indicate that there is an interaction and compatibility that has occurred between the PVA/PEO mixture and the Cr₂O₃ nanoparticles. depending on UV/Vis spectra, band gap affected by the increase of Cr2O₃ nanoparticles in the mixture. This can be imputed to the charge transfer between Cr2O₃ nanoparticles and the PVA/PEO matrix; hence, the absorption intensity of the films doped with Cr2O₃ nanoparticles increased compared to the pure mixture, while the magnitudes of energy gap decreased for all direct and indirect transitions with the increase in the concentration of Cr2O₃ nanoparticles.