▎ 摘　　要

NOVELTY - Preparation of ferric oxide, graphene oxide and nitrogen (N), fluorine (F)-doped visible light response electrode includes placing titanium dioxide (TiO2)-nanotubes (NTs) electrode and ammonium fluoride (NH4F) solid mixture in muffle furnace, sintering in air atmosphere, cooling, washing surface impurities, drying to obtain NF-TiO2 electrode, immersing in iron nitrate (Fe(NO3)3) solution, ultrasonically treating, taking graphite as anode, platinum sheet as cathode and sodium sulfate (Na2SO4) solution as electrolyte and applying voltage to dissolve graphite. USE - Preparation of ferric oxide, graphene oxide and N, F-doped visible light response electrode used for processing chromium-containing wastewater (claimed). ADVANTAGE - The ferric oxide, graphene oxide and N, F-doped visible light response electrode has good separation effect of photogenerated electrons and cavity, high photocurrent, good photoelectric synergistic effect, and no secondary pollution, and can be repeatedly used. DETAILED DESCRIPTION - Preparation of ferric oxide, graphene oxide and N, F-doped visible light response electrode comprises taking TiO2-NTs electrode and NH4F solid mixture, placing in muffle furnace, sintering in air atmosphere for 2-3 hours, cooling, washing surface impurities, drying to obtain NF-TiO2 electrode, immersing in Fe(NO3)3 solution, ultrasonically treating, taking graphite as anode, platinum sheet as cathode and Na2SO4 solution as electrolyte, applying voltage to dissolve graphite, controlling dissolution time to obtain different concentrations of graphite electrolytic liquid, taking NF-TiO2 electrode as cathode and graphite electrode as anode, conducting electrodeposition using graphite electrolytic liquid, taking the obtained electrode as anode, graphite as cathode and potassium hydroxide (KOH) solution as electrolyte, conducting electrodeposition, washing and drying to obtain the product. An INDEPENDENT CLAIM is included for processing chromium-containing wastewater using ferric oxide, graphene oxide and N, F-doped visible light response electrode comprising using ferric oxide, graphene oxide and N, F-doped visible light response electrode as anode and titanium piece as cathode in a reactor, fixing the distance between the two electrodes, adding EDTA-containing electrolytes and chromium-containing wastewater, regulating the pH to acidic, stirring in the dark, regulating the voltage, and reacting.