Published Paper Details:

: ?-radiation is an electromagnetic radiation of the highest energy, highly penetrating and extremely high frequency . In present research work, SnO2/rGO nanocomposites powder were synthesized via Co-precipitation technique and then pellets are formed by using hydraulic press machine. Samples (T0, T30, T60, T120, T240) are irradiated using a Co60 gamma source with the various irradiation doses (0 kGy, 30 kGy, 60 kGy, 120 kGy, 240 kGy). In this light, the irradiated samples were characterized by X-ray powder diffraction (XRD), UV-Vis spectroscopy and, Fourier transform Infrared microscopy (FTIR) to evaluate the effect of ?-ray irradiation on their microstructure and optical properties of nanocomposite-pellets. FTIR spectrum has been used to authenticate the formation of Sn-O-Sn and C=C bond indicated the existence of SnO2 and rGO, also increase in ?-ray doses peak intensities increases confirms reduction in particle size. XRD results revealed that the strong increment in ? corresponding to (101) planes of cassiterite SnO2/rGO nanostructure. This is evident from higher doses results reduction in crystallite size (D) [1] and increment in lattice strain (?). By Tauc plot analysis optical band-gap (OBG) were calculated, OBG of pristine SnO2/rGO nanocomposite-pellets is 3.58 eV, for irradiated samples T30, T60, T120, and T240 is 3.28 eV, 3.25, 3.19, and 3.11 eV results that as the ? -ray doses increases OBG decreases. The formation of shallow impurity states were responsible for the reduction of Eg with the increases in ? -ray doses [2]. According to this study, the flaws created by irradiation have a significant influence in the structural and optical characteristics of nanocomposites-pellets. In future, this research work is very useful for optoelectronic, microelectronics and, gas sensing applications.