▎ 摘　　要

NOVELTY - Preparation of mesoporous alpha -ferric oxide/nitrogen-doped reduced graphene composite photocatalyst involves mixing nitrogen-doped graphene and mesoporous alpha -ferric oxide, adding anhydrous ethanol, ultrasonically processing, stirring under mercury lamp condition to perform reduction process, drying, and centrifugally washing several times with absolute ethanol. The nitrogen-doped graphene is prepared by adding ground graphene oxide and urea to a tubular furnace, introducing argon to replace air in the furnace, washing the surface of the sample to remove impurities, and drying. USE - Preparation of mesoporous alpha -ferric oxide/nitrogen-doped reduced graphene composite photocatalyst (claimed). ADVANTAGE - The method enables efficient preparation of environmentally-friendly mesoporous alpha -ferric oxide/nitrogen-doped reduced graphene composite photocatalyst with rapid electronic transition and high photodegradation efficiency. The composite photocatalyst effectively degrades p-nitrophenol. DETAILED DESCRIPTION - Preparation of mesoporous alpha -ferric oxide/nitrogen-doped reduced graphene composite photocatalyst involves mixing each 0.2-0.7 mg/ml nitrogen-doped graphene and mesoporous alpha -ferric oxide in a quartz glass tube, adding 50 ml anhydrous ethanol, ultrasonically processing at 500 W for half an hour, stirring for 6-10 hours under mercury lamp condition to perform reduction process, drying obtained mixed solution at 50-70 degrees C for 12 hours, and centrifugally washing several times with absolute ethanol. The content of nitrogen-doped graphene is adjusted by adding different amount of nitrogen-doped graphene. The prepared composite photocatalyst is labeled with m- alpha -Fe2O3/NGR-x, where x is content of nitrogen-doped graphene. The nitrogen-doped graphene is prepared by grinding 0.5-1.5 g graphene oxide and 1.5-4.5 g urea, respectively, adding ground graphene oxide and urea to a tubular furnace, introducing argon to replace air in the furnace for 2 hours, washing the surface of the sample with 1 M hydrochloric acid several times to remove impurities, and drying at 40-60 degrees C for 24 hours. The mesoporous alpha -ferric oxide is prepared by mixing 1-2 g KIT-6 and 10-20 ml absolute ethanol at 700-900 rpm for 1 hour, obtaining colorless solution, mixing 1-2 g iron nitrate nonahydrate and 10-20 ml absolute ethanol at 800-1200 rpm for 0.5 hour, obtaining yellow solution, adding yellow solution to the colorless solution, stirring for 1 hour, placing the mixture under constant temperature of 50-70 degrees C for 12 hours, calcining at 600 degrees C for 6 hours, naturally cooling to room temperature, adding 2M sodium hydroxide solution to obtained red powder, stirring at 50-70 degrees C for 1 hour, centrifuging to remove template agent, and drying at 50-70 degrees C for 24 hours.