▎ 摘　　要

NOVELTY - Preparing Z-type heterojunction copper oxide-graphene alpha-ferrous oxide nanotube array photocatalyst involves preparing alpha -ferrous oxide nanotube array by polishing high-purity iron plate with sandpaper, and then sequentially sonicated in absolute ethanol and distilled water for 10 minutes. The obtained plate is blown with dried nitrogen air, and allowed to stand. The obtained sheet is pre-treated as the anode and the platinum sheet as the cathode. The anode and cathode are added into fluoride and deionized aqueous solution of ethylene glycol as electrolyte for carrying first anodization. USE - Method for preparing Z-type heterojunction copper oxide-graphene alpha-ferrous oxide nanotube array photocatalyst (claimed). DETAILED DESCRIPTION - Preparing Z-type heterojunction copper oxide-graphene alpha-ferrous oxide nanotube array photocatalyst involves preparing alpha -ferrous oxide nanotube array by polishing high-purity iron plate with sandpaper, and then sequentially sonicated in absolute ethanol and distilled water for 10 minutes. The obtained plate is blown with dried nitrogen air, and allowed to stand. The obtained sheet is pre-treated as the anode and the platinum sheet as the cathode. The anode and cathode are added into fluoride and deionized aqueous solution of ethylene glycol as the electrolyte for carrying out first anodization. The obtained material is then sonicated in deionized water for 5 minutes for the formation of nano-porous oxide layer. The obtained material is subjected to an oxidation, rinsed with deionized water, dried with nitrogen air nitrogen, placed in a muffle furnace under oxygen atmosphere for calcining and then finally cooled to room temperature to obtain FNA. Three-electrode electrochemical system is constructed by using the FNA substrate as the working electrode, the platinum plate as the counter electrode and the saturated calomel electrode (SCE) as the reference electrode. Cyclic voltammetry is used to deposit and reduce the graphene (G) layer onto the FNA substrate in graphene oxide dispersion. The material is rinsed with deionized water and dried in nitrogen to obtain G/FNA after the deposition. The G/FNA substrate is taken as a working electrode, a platinum plate is used as a counter electrode, and a SCE is a reference electrode to form a three-electrode electrochemical system. The ethyl-3-methylimidazolium ethylsulfonate in copper salt aqueous solution is used as electrolyte. The copper oxide nanoparticles are deposited on the G/FNA surface by a constant voltage method. The nanoparticles are rinsed with deionized water and dried under nitrogen deposition to obtain the desired product.