Ferric oxide, graphene oxide and N-F codoped visible light response electrode as well as preparation method and application thereof

The invention discloses a ferric oxide, grapheme oxide and N-F codoped visible light response electrode as well as a preparation and application thereof. The method comprises the following steps: (1) mixing a TiO2-NTs electrode with NH4F under an air atmosphere, and calcining the mixture to obtain an N, F-TiO2 electrode; (2) immersing the N, F-TiO2 electrode in Fe(NO3)3, using a graphite electrode as an anode, using a platinum sheet as a cathode, using Na2SO4 as an electrolyte, and dissolving graphene to get a grapheme electrolyte; (3) drying the immersed electrode serving as a cathode, using the graphite electrode as a anode, and electrically depositing the electrodes in grapheme electrolyte; and (4) using the electrode which is processed in the step (3) as an anode, using graphite as a cathode, and using KOH as an electrolyte to perform electric deposition, cleaning and drying the electrically deposited electrode. In the electrode provided by the invention, after ferric oxide and grapheme oxide are codoped, the photo electron and cavity separation effect is good, the photo-electric current is high, the effect for treating chromium-containing wastewater through photo-electro cooperation is good, no secondary pollution exists, and the treated wastewater is reusable.