▎ 摘　　要

NOVELTY - Method for preparing magnetic reduction graphene oxide/silver tungstate composite photocatalyst, involves (a) preparing graphene oxide by Hummers method by (i) uniformly mixing concentrated sulfuric acid, graphite, sodium nitrate and potassium permanganate, adding obtained mixture to stirrer, uniformly stirring, and heating for performing pre-reaction, (ii) adding deionized water to temperature of 90-100 degrees C, and adding hydrogen peroxide after completing the reaction, (iii) taking out reactant, and washing with 5% hydrochloric acid solution and deionized water until pH is 7, and (iv) drying obtained product in 60 degrees C vacuum drying oven to obtain flaky graphene oxide, (b) preparing magnetic reduction graphene oxide by co-precipitation method using dissolving ferric chloride hexahydrate and ferrous sulfate heptahydrate in deionized water, and drying, and (c) preparing magnetic reduction graphene oxide/silver tungstate composite material by hydrothermal method. USE - Method for preparing magnetic reduction graphene oxide/silver tungstate composite photocatalyst used as photocatalyst for degrading antibiotics in sewage (all claimed). ADVANTAGE - The magnetic reduction graphene oxide/silver tungstate composite photocatalyst effectively adsorbs and degrades the lomefloxacin antibiotic remaining in water, has strong adsorption and photodegradation effects, is recycled and reused magnetically and environmentally-friendly, and ensures excellent biocompatibility. DETAILED DESCRIPTION - Method for preparing magnetic reduction graphene oxide/silver tungstate composite photocatalyst, involves (a) preparing graphene oxide by Hummers method by (i) uniformly mixing concentrated sulfuric acid, graphite, sodium nitrate and potassium permanganate, adding obtained mixture to stirrer, uniformly stirring, and heating for performing pre-reaction, (ii) adding deionized water to temperature of 90-100 degrees C, and adding hydrogen peroxide after completing the reaction, (iii) taking out reactant, and washing with 5% hydrochloric acid solution and deionized water until pH is 7, and (iv) drying obtained product in 60 degrees C vacuum drying oven to obtain flaky graphene oxide, (b) preparing magnetic reduction graphene oxide by co-precipitation method by (I) taking graphene oxide in deionized water, performing ultrasonic treatment, and uniformly stirring until the graphene oxide solution is completely dissolved to obtain uniform graphene oxide solution, (II) dissolving ferric chloride hexahydrate and ferrous sulfate heptahydrate in deionized water, adding to three-necked flask, performing nitrogen charging protection, and increasing the temperature to 45 degrees C, (III) quickly adding aqueous ammonia to three-necked flask, uniformly stirring, adding graphene oxide solution, and increasing the temperature for reaction, (IV) after completing the reaction, cooling to room temperature, and performing magnetic separation using deionized water and absolute ethanol, and (V) placing obtained product in drying oven at 70 degrees C for drying and grinding to obtain powdered magnetic reduction graphene oxide, and (c) preparing magnetic reduction graphene oxide/silver tungstate composite material by hydrothermal method by (1) ultrasonically treating magnetic reduction graphene oxide, uniformly stirring to obtain magnetic reduction graphene oxide solution, adding silver nitrate solution, mechanically stirring, adding sodium tungstate solution to mixed solution, and mechanically stirring, (2) performing reaction at 180 degrees C in PTFE reaction kettle for 8-12 hours, and (3) after magnetically separating obtained product by deionized water and absolute ethanol, drying obtained product, and grinding at 80 degrees C to obtain powdered magnetic reduction graphene oxide/silver tungstate composite photocatalyst.