▎ 摘　　要

NOVELTY - 0.5-1 g/L Visible light response titanium/bismuth-graphene composite nano-photocatalytic material is added to wastewater containing 5-15 mg/L ibuprofen, stirred, and pH value of mixed liquid is adjusted to 2.2-4.6 by acid medium. Then, dissolved organic matter is added to 15-45 mg/L mixture solution, and irradiated by visible light for 0.5-2 hours. During the photocatalytic degradation of ibuprofen, sample is ultrasonically processed and concentration of ibuprofen is determined by liquid chromatography and removed. USE - Method of removing ibuprofen micro-pollutant in water (claimed). ADVANTAGE - The method efficiently and economically removes ibuprofen micro-pollutant from water, by simple method without affecting the environment. DETAILED DESCRIPTION - In ice water bath, 10-15 g natural flake graphite powder is gradually added to 98 %mass 100-120 mL concentrated sulfuric acid, magnetically stirred for 30-40 minutes, and 20-30 g potassium permanganate is gradually added and stirred for 10 minutes. At room temperature, the resultant mixture is diluted using 90-110 ml 40-50 degrees C warm water to obtain suspension. To the obtained suspension, 30% 30-35 ml hydrogen peroxide is added, reacted for 5 minutes, filtered and oxidized to obtain oxidized graphite filter. The obtained oxidized graphite filter is rinsed using more than 10 times deionized water to neutral, and dried at 80-90 degrees C to obtain oxidized graphite dry product. 0.45-1 g Dried graphite oxide is added to 100-120 mL deionized water and ultrasonically dispersed for 1-1.5 hours, to obtain oxidized graphite dispersion. 80-130 g Bismuth nitrate pentahydrate is gradually added to oxidized graphite dispersion liquid, ultrasonically oscillated for 0.5-1 hours, and 5.2-9.6 g tetrabutyl titanate is added and oscillated for 1-2 hours. The resultant mixture is then dried at 90 degrees C and ground to obtain titanium/bismuth-graphite oxide. 1-5 g Titanium/bismuth-graphite oxide is mixed with 90-120 mL ethylene glycol, stirred for 5 minutes, ultrasonically dispersed for 0.5 hours, shaked at 100-130 degrees C for 2 hours, and filtered to obtain filter cake. The obtained filter cake is rinsed using absolute ethanol, and dried at 80-90 degrees C to obtain titanium/bismuth-graphene. The resultant product is then calcined in nitrogen atmosphere at 160-250 degrees C for 2-5 hours, cooled, and ground to obtain titanium/bismuth-graphene composite nano photocatalytic material. The mass ratio of titanium/bismuth-graphene, bismuth pentahydrate, tetrabutyl titanate and graphene is 80-130:5.2-6.6:0.45-1. 0.5-1 g/L Obtained visible light response titanium/bismuth-graphene composite nano-photocatalytic material is added to wastewater containing 5-15 mg/L ibuprofen, stirred, and pH value of mixed liquid is adjusted to 2.2-4.6 by acid medium. Then, dissolved organic matter is added to 15-45 mg/L mixture solution, and irradiated by visible light for 0.5-2 hours. The acidic medium is hydrochloric acid, sulfuric acid or nitric acid. The dissolved organic matter is humic acid or fulvic acid, derived from natural water component. During the photocatalytic degradation of ibuprofen, sample is ultrasonically processed and concentration of ibuprofen is determined by liquid chromatography and removed.