▎ 摘　　要

NOVELTY - Ternary heterojunction graphene-bismuth oxide/bismuth oxyhalide visible light photocatalyst comprises graphene, bismuth oxide and bismuth oxyhalide, where graphene accounts for 0.25-20% the total mass of the catalyst. USE - Used as ternary heterojunction graphene-bismuth oxide/bismuth oxyhalide visible light photocatalyst. ADVANTAGE - The photocatalyst: solves the problem of high recombination rate of photogenerated electrons and carriers, and improves the photocatalytic performance; and has simple steps and short synthesis time. DETAILED DESCRIPTION - Ternary heterojunction graphene-bismuth oxide/bismuth oxyhalide (graphene-bismuth oxide/BiOX) visible light photocatalyst comprises graphene, bismuth oxide and bismuth oxyhalide, where graphene accounts for 0.25-20% the total mass of the catalyst. X = halogen element. An INDEPENDENT CLAIM is also included for preparing ternary heterojunction graphene-bismuth oxide/bismuth oxyhalide (graphene-bismuth oxide/BiOX) visible light photocatalyst comprising (i) dissolving bismuth nitrate in the nitric acid solution, stirring, adjusting pH to neutral using alkali, magnetically stirring for 0.5-2 hours, filtering, washing with anhydrous ethanol and distilled water in sequence, drying product at 50-100 degrees C for 4-10 hours, then calcinating at 300-600 degrees C for 3-10 hours to obtain bismuth oxide, (ii) mixing graphite oxide and bismuth oxide and adding into the mixed solution of deionized water and absolute ethanol, performing ultrasonic dispersion for 0.5-2 hours, transferring mixed solution into the reaction kettle at 80-180 degrees C for 2-12 hours, and then filtering, washing with anhydrous ethanol and distilled water in sequence, and drying at 50-100 degrees C for 4-12 hours to obtain graphene-bismuth oxide, and (iii) adding halogen acid into the graphene-bismuth oxide, performing ultrasonic reaction for 0.5-2 hours, then performing centrifugal separation for 0.5-2 hours, drying solid precipitated material at a constant temperature of 50-100 degrees C for 4-10 hours to obtain final product.