▎ 摘　　要

NOVELTY - Preparation of graphene composite photocatalytic material comprises adding 0.5-2 mol/L graphene solution into deionized water at volume ratio of 1:25-45, and ultrasonically dispersing at 15-25 degrees C for 25-45 minutes to obtain graphene dispersion; mixing 4-8 pts. wt. potassium titanate, 2-5 pts. wt. zinc citrate dihydrate, 3-7 pts. wt. strontium zirconate and 4-9 pts. wt. lanthanum oxalate, ultrasonic stirring for 20-40 minutes, freezing for 4-8 hours at - 20 to 0 degrees C, adding 1-5 pts. wt. bismuth salt, and ultrasonically stirring at 30-40 degrees C 30-50 minutes to obtain uniformly dispersed colloidal liquid; mixing 20-40 pts. wt. graphene dispersion and 10-20 pts. wt. colloidal liquid, heating to 80-120 degrees C at 1-4 degrees C/minute, and reacting for 2-5 hours to obtain reactant; and naturally cooling to room temperature, filtering, washing using distilled water and absolute ethyl alcohol, drying for 3-6 hours at 80-100 degrees C, and grinding to obtain graphene composite photocatalytic material. USE - Method for preparing graphene composite photocatalytic material.