Effect of TiO2 Nanoparticles on Structural and Optical Properties of Poly pyrrole, Poly vinyl alcohol Polymer Blend Thin Films

Abstract

Thin films of (Poly Pyrrole - Poly Vinyl Alcohol) PPY-PVA polymer blend doped with different concentration of TiO2 nano particles were prepared via oxidative chemical polymerization technique (in-situ). The properties (Structural & Optical) of these thin films were studied by XRD, FTIR, SEM and UV spectroscopic techniques. The optical band gap values of TiO2 doped polymer blend were calculated by UV spectroscopic studies, and also noticed that obtained band gap values were decreased with increase in the concentration of TiO2 nano particles. XRD and FTIR results support the polymer blend formation, and dispersion of TiO2 nano particles in the polymer blend. The modification in surface morphology of polymer blend is due to presence of TiO2 nano particles which was confirmed by SEM results.

Comparative Study on Structural, Dielectric Behavior and AC Conductivity of PPY-PVA Incorporated with TiO2 Fine and Nano Particles

“…In PPY-PVA-nano TiO 2 films, dopant particles get distributed throughout PPY-PVA matrix effectivly compared to fine particles which might be due to their large surface area to z E-mail: trameshreddy31@gmail.com ECS Journal of Solid State Science and Technology, 2024 13 033007 volume ratio of nano TiO 2 particles. 25,26 XRD spectra of PPY-PVAnano TiO 2 established that peaks have been broadened and having less intense compared to PPY-PVA-fine TiO 2 films which might be due to modification in interplanar spacing. 24,[30][31][32] Dielectric studies.-Thin films of PPY-PVA doped with different concentrations of TiO 2 fine particles have been investigated by Impedence spectroscopy in frequency range 100 Hz-5 MHz at room temperature and plotted graph between frequency verses Dielectric constant and frequency verses Dielectric loss depicted (Figs.…”

“…Finally, a black coloured PPY-PVA-TiO 2 thin film was obtained after evaporating excess water. 25,26 PPY-PVA-TiO 2 thin films were prepared by varying concentrations of TiO 2 fine particles like 2%, 3% and 4% using same procedure. Another set of PPY-PVA-TiO 2 thin films have been prepared by varying concentrations of nano TiO 2 particles (like 1%, 2%, 3% and 4% of TiO 2 ) by the same procedure.…”