Effect of radiation on the structure and optical absorption properties for binary oxide system

Abstract

The samples of pure MgO, TiO2 and MgO-TiO2 oxides with different MgO molar ratios were synthesized by sol–gel method. The synthesized samples were characterized by various analytical techniques such as energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), transmission electron microscopy (TEM) and ultra violet visible spectrophotometry (UV–VIS). The influence of different irradiation doses on the structure and absorption properties of the prepared oxides samples was investigated. Using the analytical method from XRD, the crystal lattice in addition to the surface area, molar volume and the oxygen packing density have been estimated for the irradiated and un-irradiated samples. The induced changes in optical absorption measurements have been observed and the results reflected a great dependence of the fundamental absorption edge on the irradiation dose. The oscillator, dipole strength and dipole moment were also investigated in this study and changes were observed at elevated irradiation dose. Furthermore, the surface morphology in the binary oxides was discussed with respect to higher MgO molar ratios.