▎ 摘　　要

NOVELTY - A titanium sheet and platinum electrode are connected to direct-current power supply. The direct current is applied to aqueous solution of hydrofluoric acid as electrolyte, and subjected to ultrasonic condition. The obtained anode sample is calcined to obtain anatase-type titania nanotube array film electrode. The nano copper oxide is deposited on surface of titania nanotube array film electrode. A graphite oxide film is self-assembled on copper oxide/titania nanotube array electrode. The electrode is heated, to obtain copper oxide/titania nanotube array electrode. USE - Preparation of graphene film covered copper oxide/titania nanotube array electrode. ADVANTAGE - The graphene film covered copper oxide/titania nanotube array electrode having excellent photocatalytic efficiency is economically prepared, by simple method. DETAILED DESCRIPTION - A titanium sheet and platinum electrode are connected to direct-current power supply as positive electrode and negative electrode, respectively. The direct current with voltage of 20 V is applied to aqueous solution of hydrofluoric acid (0.5 wt.%) as electrolyte, and subjected to ultrasonic condition. The positive electrode is oxidized by electrolyzing for 0.5 hour. The obtained anode sample is calcined in a muffle to obtain uniformity-distributed and orderly-arranged high-catalytic active anatase-type titania nanotube array film electrode. The nano copper oxide is deposited on surface of titania nanotube array film electrode by electrochemical method. The composition of electrolyte solution contains copper sulfate (0.2-0.4 mo1/L) and lactic acid (3 mol/L), and pH is adjusted to 9.5-11.5. The three-electrochemical deposition system comprises titania nanotube array electrode as working electrode, platinum sheet as negative electrode, and mercury oxide/sodium hydroxide electrode as reference electrode, and using potentiostat or constant-current meter at electric potential of -0.5 volt to -1 volt, and copper oxide film is electrodeposited at room temperature, and sintered at 200 degrees C for 1 hour under nitrogen atmosphere, to obtain copper oxide/titania nanotube array electrode. A graphite oxide film is self-assembled on copper oxide/titania nanotube array electrode, and subjected to reduction-oxidation of graphene oxide. The electrode is provided to dispersing agent at 20-80 degrees C for 0.5-10 hours and heated at 200 degrees C for 2-3 hours, to obtain copper oxide/titania nanotube array electrode with graphene packaging on the surface.