Scilight Press

The nanocomposite (PVA/TiO₂/crocus) was prepared and four films were obtained with different concentrations of crocus dye. The results of optical microscopy observed nanoparticles created a continuous network inside polymers. This network had routes that allowed charge carriers to move via them inside the nanocomposites. The vibrational peaks at 3387, 3325.28, 1705.07 and 1080.14/cm were assigned to O–H stretching, C–H stretching, C–H bend of CH₂, C-O and CH rocking of (PVA/TiO₂/crocus dye), respectively along with another vibrational peaks for concentrations of nanocomposites. Increased concentration had generated new bonds in this range. Decreasing the FT-IR spectrum in the range of 3387 to 3367.71/cm showed the produced polymer chains which corresponded to O–H stretching and C– H stretching bond. The absorbance for all films had the appearance of a peak at 440 nm, which was due to the crocus dye, and had the greatest transmittance of 81.5 at a concentration of 1 ml, and then it started to decrease. The energy gap decreased from 307eV to 3.58 eV with increased concentration of crocus dye.