▎ 摘　　要

NOVELTY - Preparing photocatalyst material comprises separately dissolving zinc chloride and sodium hydroxide in ethylene glycol by heating to prepare a transparent solution and cooling to room temperature, adding sodium hydroxide solution into zinc chloride solution, stirring, heating in a water bath, adding anhydrous ethanol, stirring, centrifuging, flocculating, washing the precipitate with absolute ethanol, repeating the process, dissolving precipitate in ethylene glycol to obtain zinc oxide sol, adding zinc oxide sol, graphene oxide aqueous solution and tungsten trioxide aqueous solution, magnetically stirring, adding polydiallyldimethylammonium chloride aqueous solution containing platinum cobalt alloy nanoparticle, magnetically stirring, centrifuging, concentrating, adding ascorbic acid and zirconium dioxide microsphere, ultrasonically reacting, sealing and placing into an oven and drying with supercritical carbon dioxide. USE - The method is useful for preparing environmentally friendly high-efficiency photocatalyst material. ADVANTAGE - The photocatalyst material: is environmentally friendly; and has high recycling rate, inhibitory effect on Escherichia coli, and has good antibacterial properties. DETAILED DESCRIPTION - Preparing photocatalyst material comprises (a) separately dissolving zinc chloride and sodium hydroxide in ethylene glycol by heating to prepare a transparent solution and cooling to room temperature, (b) adding sodium hydroxide solution into zinc chloride solution, stirring for 30-40 minutes, where the ratio of amount of substance of zinc and alkali is 1:1.5-2, (c) heating in a water bath at 70-100 degrees C for 2-4 hours, (d) adding anhydrous ethanol, stirring, centrifuging, flocculating, washing the precipitate with absolute ethanol, and repeating the process for 2-3 times, (e) dissolving 1-2 parts precipitate in 50-80 parts ethylene glycol to obtain zinc oxide sol, (f) adding 5-7 parts zinc oxide sol, 60-65 parts graphene oxidie aqueous solution (0.33 mg/ml) and 10-15 parts tungsten trioxide aqueous solution (0.3 mg/ml) and magnetically stirring for 30-40 minutes, (g) adding 40 parts polydiallyldimethylammonium chloride aqueous solution containing 6-8 parts platinum cobalt alloy nanoparticle, magnetically stirring for 30-40 minutes, where the volume ratio of polydiallyldimethylammonium chloride and water is 1:50, (h) centrifuging in a centrifuge at 10000 revolutions/minute for 25-30 minutes, and concentrating to 10% of the original volume, (i) adding 20-25 parts ascorbic acid and 3-5 parts zirconium dioxide microsphere, ultrasonically reacting for 2 minutes, sealing and placing into an oven at 95 degrees C for 4 hours, and (j) drying with supercritical carbon dioxide.