Heterogeneous Fenton-like degradation of methylene blue (MB) by magnetic nanoparticles Fe3O4@TiO2 in neutral condition

摘要

The traditional Fenton system (Fe~(2+)-H2O2) only works in an acidic environment and produces a large quantity of sludge. In this study, magnetic nanoparticles Ee3O4@TiO2 were used as a high-performance Fenton-like catalyst for the degradation of MB. The surface morphology was characterized by Transmission Electron Microscopy (TEM). And the Fenton-like catalytic activity of Fe3O4@TiO2 was evaluated under different pH condition and various H2O2 in feed concentration, respectively. The results indicated that nanoparticles Fe3O4@TiO2 show high efficiency for methylene blue (MB) degradation under the reaction condition of H2O2 40mM, Fe3O4@TiO2 20mM, MB 300mg/L, pH 7 and.30°C, the mineralization of persistent MB can achieve 72% COD removal ratio.