▎ 摘　　要

NOVELTY - A composite material-loaded metal oxide catalyst is represented by copper oxide/ceria-epoxy resin-chitosan-graphene oxide, and comprises copper oxide/ceria as an active component, and epoxy resin-chitosan-graphene oxide as a carrier. The ratio of active component copper oxide/ceria and chitosan is 0.5-5:0.5-5:100. USE - Composite material-loaded metal oxide catalyst used in degradation of sewage (claimed). ADVANTAGE - The composite material-loaded metal oxide catalyst has high activity, catalytic stability, and mechanical strength, and excellent catalytic effect, large specific surface area, and adsorption property, and is suitable for degrading sewage with chemical oxygen demand concentration of 3000-30000 mg/l. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of metal oxide catalyst, which involves dispersing epoxy resin, chitosan, and graphene oxide in phosphoric acid solution, adding surfactant, cerium nitrate hexahydrate, and copper nitrate trihydrate, where the ratio of cerium nitrate hexahydrate, copper nitrate trihydrate, and chitosan is 0.5-5:0.5-5:100, stirring, adding ethanol solution, reacting, adding glutaraldehyde, crosslinking, washing the precipitate, and dry-grinding; and (2) degradation of sewage with metal oxide catalyst, which involves adding copper oxide/ceria-epoxy resin-chitosan-graphene oxide catalyst into a sewage solution with a chemical oxygen demand concentration of 3000-30000 mg/l, heating at 60-70 degrees C, dripping hydrogen peroxide solution at a rate of 2.4-3.6 ml/minute, adjusting the pH to 7-8, and reacting for 30-40 minutes.