▎ 摘　　要

NOVELTY - Preparation of composite photocatalyst comprises mixing tetrabutyl titanate and anhydrous ethanol, adding graphene dispersion, mixing, where mass ratio of tetrabutyltitanate, anhydrous ethanol, and graphene is 80-120:100-500:0.2-5, cooling to 0-5 degrees C, gradually adding nitric acid aqueous solution, and continuously stirring. USE - Method for preparing composite photocatalyst. ADVANTAGE - The method has simple preparation process, low cost, high photocatalytic activity, and good dispersion stability.