Characterization of the structure of TiO2 P25 modified by mechanosynthesis

Abstract

"Structural changes in the modified P25 TiO2 were studied from mechanosynthesis method at 650 rpm at different times in air. These materials were characterized by Raman, XRD and UV-VIS reflectance. X-rays show changes in the crystallinity of TiO2 as new corresponding phases appear to deformation generated by the mechanical stress to which it is subjected, also, decreasing grain size generates a frequency-range which reflected in the widening of the diffraction peaks, this behavior is further confirmed in the results of Raman spectroscopy while the spectra of UV-Vis diffuse reflectance, shows that the milling time changes the electrical conductivity of the material, so that the mechanosynthesis applied on the TiO2 can modify the properties of electrical conductivity of the material, also, it was determined that the electrical properties of the material are a function of particle size."