▎ 摘　　要

NOVELTY - Magnetic ferric oxide/graphene oxide nanocomposite Fenton-like catalytic materials comprises ferric oxide with nano hollow sphere structure, and graphene oxide with a fold-like thin film structure covering the surface of the hollow sphere. USE - Magnetic ferric oxide/graphene oxide nanocomposite Fenton-like catalytic material used to papermaking wastewater, where papermaking wastewater is the effluent from a secondary biochemical pond of a paper mill, and pH range of the wastewater is below 7.0, and the dosage of hydrogen peroxide is 2.0-3.5 mole per liter (all claimed). ADVANTAGE - The magnetic ferric oxide/graphene oxide nanocomposite Fenton-like catalytic material is magnetically recyclable, has mild reaction conditions, a wide pH range, and good processing effects. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing magnetic ferric oxide/graphene oxide nanocomposite Fenton-like catalytic material, which involves: (A) dissolving graphene oxide in ultrapure water, sonicating, and collecting the supernatant by centrifugation; (B) adding ferric trichloride hexahydrate, urea and citric acid to the supernatant, stirring, adding polyacrylic acid dropwise to the solution and mixing well; and (C) carrying out a hydrothermal reaction, and finally obtaining the magnetic triiron tetroxide/graphene nano-composite Fenton-based catalytic material through an external magnetic field separation, washing separately with water and absolute ethanol.