▎ 摘　　要

NOVELTY - A graphene copper-nickel composite photocatalyst comprises 10-15 mass% copper-nickel bimetal, and 85 mass% single-flake graphene. The atomic ratio of copper and nickel is 1:2-2:1. USE - A graphene copper-nickel composite photocatalyst used in sewage treatment and organic degradation (claimed). ADVANTAGE - The photocatalyst is prepared using a mild reaction condition, and simple and environment-friendly method. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing the graphene copper-nickel composite photocatalyst, comprising: (A) adding organic amine or alcohol medium to graphite oxide at room temperature with low magnetic stirring and ultrasonically dispersing for 30 minutes, adding deionized water, continuing magnetically stirring for 24 hours, centrifuging to removes excess water and excess organic amine or alcohol medium, washing with deionized water to obtain an organic molecule modified graphene oxide; (B) placing the organic molecule modified graphene oxide in a container, adding 6-12 mmol/L solution of divalent metal salt of copper and nickel, magnetically stirring and uniformly mixing to obtain a mixed solution containing 1 g/L graphene oxide nanosheet; (C) adding sodium hydroxide in the mixed solution to regulate pH value of solution and promote oxidation of graphene nanosheet, continuous magnetic force stirring while injecting inert gas to remove dissolved oxygen to obtain a mixture; (D) quickly transferring the mixture in a reaction kettle, and reacting at 80-120 degrees C for 30-120 minutes; and (E) washing with water and ethanol for 3 times, ultrasonic centrifuging, soaking in acetone to obtain surface micro-oxidation, washing twice with acetone, and vacuum drying at 60 degrees C for 6 hours.