Synthesis, Structural and Optical Characterization of TiO2 Nanoparticles and its Assessment to Cytotoxicity Activity

In this research work,TiO2 nanoparticles was synthesised by solgel method using titanium (IV) isopropoxide and calcinated at 500 °C, 600 °C and 700 °C for five hours. The synthesised nanoparticles are characterized by using X-ray Diffraction studies (XRD), Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray Spectroscopy (EDXA), UV-Vis Diffuse Reflectance Spectroscopy (UV-Vis), Photoluminescence Spectra (PL), High Resolution Transmission Spectroscope (HRTEM) and Fourier Transform Infra Red Spectroscopy (FTIR). The synthesized nanoparticle of TiO2 calcinated at 500 °C and 600 °C for 5 hr shows anatase nature crystal structure and temperature increased to 700 °C, they undergo structural changes to rutile structure at the same duration of calcination. Average crystallite size can be determined by Debye-Scherrer formula for synthesized nanoparticles shows the particle sizes range from 30 nm to 47 nm. EDXA analysis confirms no impurities present in the sample. The band gap value decreases from 2.95 eV to 2.79 eV when calcination temperature increases in the UV-Visible analysis. The photoluminescence study of TiO2 shows the direct recombination between electrons in the conduction band and holes in the valence band. FTIR analysis shows the bending and stretching mode of Ti-O-Ti. HRTEM of TiO2 nanoparticles shows nearly spherical with approximately particles size of 35 nm to 50 nm. The cytotoxicity activity of TiO2 nanoparticles calcinated at 500 °C, 600 °C and 700 °C has been explored.