▎ 摘　　要

NOVELTY - Preparation of catalyst involves adding a pretreated ceramic substrate into an ultrasonic reactor, soaking in potassium permanganate aqueous solution, washing, adjusting pH, obtaining processed ceramic substrate, dissolving tetrabutyl titanate in absolute ethanol, stirring, adding ethylene glycol, graphene sol, bismuth nitrate pentahydrate and ammonium metavanadate in ethanol, stirring, obtaining a colloidal solution, adding the ceramic substrate to the colloidal solution, soaking, loading with titanium dioxide, bismuth vanadate and graphene precursor sol-gel, drying and calcining. USE - Preparation of catalyst used for photodegradation of organic pollutant. ADVANTAGE - The method enables preparation of catalyst having excellent photo-degradability of organic pollutant. The catalyst enables complete degradation of sulfur, nitrogen, ammonia, phenol, polycyclic aromatic hydrocarbon, pesticide, antibiotic, virus, bacteria and other toxic and odors. DETAILED DESCRIPTION - Preparation of catalyst involves performing laser drilling of a ceramic substrate, adjusting laser beam, array and power, obtaining pretreated ceramic substrate, adding the pretreated ceramic substrate into an ultrasonic reactor, soaking in potassium permanganate aqueous solution at 60-80 degrees C for 0.5-2 hours, leaving still for 24 hours, washing, adjusting pH to 6.5 or more, obtaining processed ceramic substrate, dissolving 30 ml tetrabutyl titanate in 100 ml absolute ethanol, stirring, adding 20 ml ethylene glycol, 10 ml graphene sol, 10 ml bismuth nitrate pentahydrate and ammonium metavanadate in ethanol, stirring at 20-60 degrees C for 2 hours, obtaining a colloidal solution, adding the ceramic substrate to the colloidal solution, soaking at 35-50 degrees C and vacuum for 24 hours, loading with titanium dioxide, bismuth vanadate and graphene precursor sol-gel, drying at 110 degrees C for 2-4 hours and calcining at 350-650 degrees C for 2-4 hours.