Cobalt oxide and Co3O4 / TiO2 hybrid nanoparticle were prepared utilizing the one step electrolytic deposition method. The new nanoparticle antioxidant has been diagnosed according to the infrared spectroscopy by the emergence of new groups in the Co3O4 / TiO2 spectrum, which indicates the formation of a new antioxidant. X-ray diffraction technology has shown the emergence of new diffraction levels in the anti-Co3O4 / TiO2 spectrum compared to the cobalt oxide diffraction spectrum. The morphology of synthesized compounds were examined by Field Emission Scanning Electron Microscopy (FESEM), pure Co3O4 which have sphere-shaped aggregations forms have 30.27 nm size, while TiO2/ Co3O4 nanocomposite shows Hexagonal sheets structure and clearly indicates that the Co3O4 is diffusion on surface of TiO2 with 33.9 nm size. The EDS of the elemental is indicating uniform formation of TiO2 / Co3O4 composite by presented of titanium, cobalt and oxygen. Antioxidant activity of pure Co3O4and Co3O4- TiO2 samples were compared using H2O2 scavenging activities. Considerable in vitro antioxidant activities in a concentration-dependent manner were recorded. Interestingly, Co3O4 / TiO2 showed more elevate scavenging in H2O2antioxidant assays in low concentrations but this activity decrease with increase the nanocomposite concentration.

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