▎ 摘　　要

Fe2+-H2O2 Fenton system is the most applied system in advanced oxidation process for water remediation, but the drawbacks of acidic pH, sludge generation and poor regeneration are serious problems to overcome. Herein, we reported the Fe3O4/TiO2/reduced graphene oxide composites (RGO) as high-performance Fenton-like catalyst that could catalyze the decomposition of H2O2 in near neutral pH range of 5-9 for the decoloration of dye methylene blue (MB). The high catalytic activity of Fe3O4/TiO2/RGO was reflected by the fast absorbance decrease and chemical oxidation demand removal of MB solution within 20 min. The oxidation of MB was due to the radical generation in the Fe3O4/TiO2/RGO-H2O2 system, and the radicals could oxidize MB before the scavenging by the radical scavenger t-butanol. Higher Fe3O4/TiO2/RGO amount, H2O2 concentration and temperature accelerated the decoloration of MB. Fe3O4/TiO2/RGO could be easily regenerated by washing with water/ethanol mixture. The implication to the applications of Fe3O4/TiO2/RGO in water treatment is discussed.