Role of Batio3/Tio 2 Nanofillers on the Optical Characteristics of Biopolymer for Optics and Photonics Fields, and Future Application for Antibacterial Activity

Abstract

In this work, the PVA/BaTiO3/TiO2 nanostructures were made by solution casting technique with varioaus weight percentages of BaTiO3/TiO2 nanoparticles (0, 1, 1.5,2, and 2.5) wt %. The structural and optical properties for films were studied. The optical microscope demonstrated that nanoparticles form a continuous system surrounded by polymers. This network is made up of pathways that lead indoors nanocomposites and allows absolving carriers to move over them. Scan electron microscope revealed a strong dispersion of BaTiO3 and TiO2 on the polymeric matrix's surface. And the results revealed that as the concentration of BaTiO3/TiO2 nanoparticles rises, (the absorption- absorption coefficient- extinction coefficient- refractive index- real and imaginary dielectric constants- optical conductivity) increases. Optical energy gap for PVA was lessened from 4.5 eV of pure PVA to 3.25 eV for allowed indirect transition and from 4.25 eV to 3.4 eV for forbidden indirect transition while the BaTiO3/TiO2 nanoparticles concentration reached (2.5 wt.%), this conduct create it suitable of several optical approaches. With increasing concentrations for BaTiO3/TiO2 nanoparticles the transmittance is drop. The final results demonstrated that the PVA/BaTiO3/TiO2 nanostructures had good optical properties for use in optics and electronics devices.