Synthesis of PVA-Fe2O3-TiO2 hybrid structure for biomedical application

Abstract

This work investigates the structure, morphology, and optical properties of TiO2 nanoparticles embedded in a Fe2O3–PVA composite matrix. The samples were examined using a variety of techniques, including field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), absorption and transmission spectra, and Fourier transformation infrared (FTIR). Crystallography information revealed the presence of TiO2 doesn’t effect in the crystal structure of PVA-Fe2O3. The manufactured composites demonstration strong absorption in the range of 440–570 nm. It is important that the highest absorption of these composites gradually shifted to the shorter wavelength region with presence of TiO2. PVA-Fe2O3 is highly transparent with transmittance of around 85 % in range 600-800 nm. After addition of 2.5 % by weight of TiO2 nanoparticles, the transmittance of nanocomposite drops to 75% in the same range of wavelength . Further addition of nanoparticles reduced the percentage transmittance to 68%. The results specify that as the TiO2 ratio increases, the band gap be wider.