Abstract
Metal and metal oxide materials are mostly used to tune the optical characteristics. The optical and systemic effects of pure Cobalt Oxide (Co3O4) are examined by knocking out the dissimilar assemblage of Manganese (Mn) ions using the co-precipitation method. Graphene oxide (GO) reduces the optical band gap and enhances the effects of ethical Co3O4 and MnCo3O4 by hydrothermal procedure. The percentage of Mn over pure Co3O4 was 0.09wt.%, 0.18wt.%, 0.27wt.%, and GO doped over MnCo3O4 was 1wt.%. Remarkably, spinel-type cobalt oxide has two participation band gaps at 494nm and 772nm of nanocomposites which then shifted from 494nm to 510nm and 772nm to 779nm with the doping of GO. The result describes that the band gap was minimized from 1.76eV to 1.59eV respectively to accommodate the density of states by doping of Mn ions and GO. Conductivity and optical absorbance were also increased by doping assemblage of Mn ions and GO. XRD peaks show the FCC crystalline structure of Co3O4, and the GO peak disappeared for @MnCo3O4, indicating that GO was completely reduced to rGO during the synthesis process.
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