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This study deals with the synthesis of some physical properties of (CdO/NiO) nanocomposite via Sol-Gel method and their antibacterial activities. The NiO and CdO nano oxides as well as the CdO/NiO oxide mixture were prepared in five samples with different concentrations where the ratio of CdO/NiO was [(1: 0), (3: 1), (1:1), (1: 3), (0: 1)], by using the gel solution by means of a Polyvinyl Alcohol Solution (PVA). The samples were plate limb at (500̊°C) for three hours. The structural properties of the prepared oxides resulting from the cracking process were studied. The XRD results showed the presence of pure cadmium oxide diffraction patterns in the sample (S1) as well as pure nickel oxide in the sample (S5), and confirmed the presence of the CdO / NiO oxide mixture in the samples (S2, S3, S4). The results of XRD also showed, through calculations, that the specific surface area increased with increasing granular size and decreased with decreasing granular size. XRD calculations also showed that the intensity of eruptions
decreased as the granular volume increased and, inversely, increased with decreasing granular size. Optical measurements were taken and absorption spectra at the wavelength (215 nm) within the UV range. The results of the optical measurements showed an increase in the energy gap of the mixture. Samples were taken for continuous electrical conductivity measurements.
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