Effect of Amounts of Titanium Dioxide Nanoparticles on FTIR Spectra and Optical Properties of Poly Vinyl Alcohol Films

Abstract

      In this paper, thin films of pure PVA, TiO₂ /PVA with various amounts of TiO₂ nanoparticles (0.007, 0.01, 0.02 and 0.03) g have been acquired by solution casting method. FTIR spectra for all samples measured in transmission mode. The effect of adding TiO₂ nanoparticles is seen by changing changing transmittance whereas the behavior of the spectrum of PVA is unaffected. The optical characteristics were assessed across a wavelength range of (200-800) nm. The findings from the experiment indicate that the absorbance of TiO₂ /PVA films rose as the quantity of TiO₂ nanoparticles increased. There is one peak of absorption spectrum for pure PVA at (275 nm) with intensity (0.113). UV-visible analysis revealed a significant improvement in the UV protection capabilities of the hybrid films following the incorporation of TiO₂. The energy gap values decreased as the amount of TiO₂ nanoparticles increased, ranging from (5.15 to 4.90) eV.