Abstract
CoFe2O4 and MnxCo1-x Fe2O4 (x = 0.5 atom %) samples were synthesized by sol–gel combustion method. XPS spectra confirms the presence Mn and Co is in + 2 oxidation state. Binding energy values suggests Fe in + 3 oxidation state in MnCoFe2O4 catalyst. Mn0.5Co0.5Fe2O4 sample shows best fit to the Langmuir adsorption isotherm. Quantitative prediction of the carrier trapping/detrapping energy is essential for the assessing the semiconducting electron transport mechanism and formation of small-Polaron hopping correlated with photocatalytic activity. Higher photocatalytic activity is observed for Mn doped CoFe2O4 due to unique characteristic Mn2 + ion which can exist in different oxidation states. The Fe2+ ions intern get reoxidised to Fe3 + state through the multi electron reduction of oxygen. To the best of our knowledge the influence of hopping and Polaron formation in the spinel lattice for degradation of Methyl Violet by using Mn doped CoFe2O4 catalyst is rarely attempted.
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