AMEEN ALWAN MOHAIMEED* AND BAHAA H. RABEE
Department of Physics, College of Education for Pure Sciences, University of Babylon, Iraq
*(e-mail: ameenalwan@87gmial.com; Mobile : 78094 93899)
(Received : May 10, 2022; Accepted : June 13, 2022)
ABSTRACT
Four thin films of PVA+TiO2 were prepared with different concentration of natural pomegranate dye. The results of the optical microscope showed the formation of a network of TiO2 nanoparticles inside the polymer that increased the movement of electrons. FT-IR spectroscope recorded 3325.28, 2908.94, 1423.46 and 1056.99/cm corresponding to O-H, C-H, C-C and C-O functional groups, respectively. The structure of natural dye (anthocyanin) had a benzene skeleton, a conjugated double bond, a C-H carbonyl group and an OH bond, according to the IR spectrum. The results revealed that when the quantity of pomegranate dye increased, so did the absorption, and the absorption coefficient increased when the wavelength of the sample was increased. The results demonstrated that as the dye concentration increased, the optical energy gap of the (PVA/TiO2/pomegranate dye) film reduced (3.65-3.59 eV).
Key words : Pomegranate natural dye, TiO2 nanoparticles, (PVA/TiO2/pomegranate dye) thin films, FTIR spectroscopy, optical spectroscopy