▎ 摘　　要

NOVELTY - Preparing nano-composite material powder and applying catalysis involves weighing graphene, copper sulfate, sodium hydroxide, hydrazine hydrate and graphene with specific formulation ratio, where the graphene comprises 10-15 pts. wt. graphene, 75-85 pts. wt. copper sulfate, 0.1-0.3 pts. wt. sodium hydroxide, 0.1-0.3 pts. wt. aqueous ammonia and 5-10 pts. wt. hydrazine hydrate, carrying out ultrasonic mixing on copper sulfate in the aqueous solution for 1-2 hours, and cooling to room temperature to obtain first mixed solution. USE - Method for preparing nano-composite material powder and applying catalysis. ADVANTAGE - The prepared nano-composite material powder has good photocatalytic degradation performance on wastewater containing organic dye. DETAILED DESCRIPTION - Preparing nano-composite material powder and applying catalysis involves weighing graphene, copper sulfate, sodium hydroxide, hydrazine hydrate and graphene with specific formulation ratio, where the graphene comprises 10-15 pts. wt. graphene, 75-85 pts. wt. copper sulfate, 0.1-0.3 pts. wt. sodium hydroxide, 0.1-0.3 pts. wt. aqueous ammonia and 5-10 pts. wt. hydrazine hydrate, carrying out ultrasonic mixing on copper sulfate in the aqueous solution for 1-2 hours, cooling to room temperature to obtain first mixed solution, adding sodium hydroxide into the obtained first mixed solution, adjusting the pH value to about 8 to obtain a second slightly alkaline mixed solution, adding a reducing agent hydrazine hydrate into the obtained slightly alkaline mixed solution, completing the process under the condition of vibration for about one hour, standing for 24 hours, performing centrifugal separation, performing vacuum drying to obtain a cuprous oxide-graphene nano fusiform powder product, adding aqueous ammonia into the obtained cuprous oxide-graphene nano fusiform powder product, adjusting the pH value to about 8 to obtain a third slightly alkaline mixed liquid, adding a reducing agent hydrazine hydrate into the obtained third slightly alkaline mixed liquid, stirring, standing for 24 hours, performing centrifugal separation, performing vacuum drying to obtain a cuprous oxide/graphene nano blocky powder product, weighing one portion of the obtained cuprous oxide/graphene nano fusiform powder product and one portion of the obtained cuprous oxide/graphene nano blocky powder product respectively, adding 200-300 pts. wt. waste water containing the same organic dye (containing 20-100 mg/L organic dye), adding the 2 pts. wt. powder into the 2 pts. wt. waste water respectively, stirring uniformly, sampling every 10 minutes under the condition of visible light, and analyzing the change of the absorbance of the ultraviolet absorption spectrum to obtain the degradation condition of the powder on the organic dye in the wastewater. DESCRIPTION OF DRAWING(S) - The drawing shows a scanning electron microscope topography of cuprous oxide/graphene nano-composite.