Mn-Fe binary oxide incorporated diatomite for phenol oxidation reaction

Tóm tắt

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.