▎ 摘　　要

NOVELTY - A composite photocatalyst comprises (001) active surface copper oxide/titania and graphene at mass ratio of 100:10. USE - Composite photocatalyst. ADVANTAGE - The method is simple, environment-friendly and suitable for large-scale industrial production, and it has convenient operation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of composite photocatalyst comprising adding copper nitrate, tetrabutyl titanate and hydrofluoric acid at ratio of 0.0137 g:5 mL:0.8 mL into reactor, oven-heating to 180 degrees C for 24 hours, cooling to room temperature, centrifuging to 4000 revolutions/minute for 5 minutes, collecting white precipitate, washing successively with ethanol and water for 3 times, soaking in 0.1 M sodium hydroxide solution for 30 minutes, filtering, washing resulting cake with water to neutralize, and drying to 40 degrees C to obtain (001) active surface copper oxide/titania colored powder; oxidizing natural graphite through Hummer's chemical oxidation to obtain graphite oxide, ultrasonically stripping with ethanol at ratio of 3 mg:5 mL for 2 hours, and dispersing to obtain graphite oxide dispersion; and adding (001) active surface copper oxide/titania colored powder, stirring for 3 hours through Teflon (RTM: PTFE) reactor, controlling temperature to 120 degrees C for 3 hours, suction filtering, washing resulting filter cake with deionized water to neutralize, and drying to 40 degrees C for 12 hours.