Mn-Fe binary oxide incorporated diatomite for phenol oxidation reaction
Fe–Mn binary oxide incorporated into diatomite was prepared by the redox reaction of KMnO4 and FeSO4.7H2O in range of pH of 3-9. The obtained catalyst was characterized by SEM, EDX and XPS. The results showed that manganse oxide and iron oxide exist multiple oxidation states including Mn2O3, MnO2, FeO and Fe2O3. The Mn-Fe-diatomite exhibited catalytically synergized properties of iron and manganese oxide. The phenol oxidation by H2O2 using Fe-Mn-diatomite as a catalyst was conducted. The phenol with 1000 ppm was minerized completely after 60 minutes while phenol was only oxidized to catechol and hydroquinone with using single MnO2 or Fe2O3.