▎ 摘　　要

NOVELTY - Preparation of visible light-ozone catalytic catalyst includes adding dicyandiamide and zinc salt into container, adding solvent, heating up and stirring, and drying to obtain dry product, calcining under inert atmosphere, cooling and grinding to obtain zinc oxide graphitic carbon nitrides (ZnO-g-C3N4) powder; and putting into ball mill tank with graphene, ascorbic acid and polyethylene glycol, adding ball milling medium, and ball-milling, transferring uniform solution obtained by ball milling into container, reacting in water bath at 90-100 degrees C for 1-3 hours to obtain reduced graphene hybrid (ZnO-g-C3N4) hydrogel, and vacuum freeze-drying. USE - The method is for preparation of visible light-ozone catalytic catalyst for treating high-salt wastewater of coal chemical industry (claimed). ADVANTAGE - The catalyst has excellent degradation efficiency for organic pollutants under visible light-ozone synergistic catalysis. The rapid and efficient separation and recovery of catalyst are realized, so that prepared catalyst has excellent cycle stable activity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for visible light-ozone catalytic catalyst prepared by the method.