▎ 摘　　要

NOVELTY - Graphene-iron-doped titania nanowires are synthesized by dissolving graphene oxide in solution of ethanol and distilled water, adding iron-doped titania nanowires, ultrasonically agitating mixture to obtain a homogeneous suspension, reacting suspension, rinsing with ethanol, filtering complex and drying filtrate. High-catalytic-activity visible-light-degradable graphene-iron-doped titania nanowires are prepared by adding photocatalyst and methylene blue solution to graphene-iron-doped titania nanowires, stirring, degrading mixture and centrifuging supernatant. USE - Preparation of high-catalytic-activity visible-light-degradable graphene-iron-doped titania nanowires for decomposing organic pollutants. ADVANTAGE - The method enables preparation of high-catalytic-activity visible-light-degradable graphene-iron-doped titania nanowires having high organic pollutant-adsorption capacity and organic pollutant-degradation characteristics. DETAILED DESCRIPTION - Iron-doped titania nanowires are synthesized by adding 2 g Aeroxide P25 (RTM: fine-particulate, pure titania) as titanium source and iron chloride hexahydrate powder with molar content of 1% to 60 mL aqueous solution, stirring for 10 minutes, adding potassium hydroxide, ultrasonically agitating for 30-60 minutes, alternately stirring once every 15 minutes until homogeneous suspension is formed, pouring 100 mL suspension to polytetrafluoroethylene-lined reactor, heating mixture at 200 degrees C for 18-30 hours, cooling mixture to room temperature, washing product with dilute aqueous hydrochloric acid, washing product with deionized water and methanol until pH is 7, vacuum filtering mixture, drying recycled product at 70 degrees C for 6 hours and calcining at 300 degrees C for 2-6 hours. Graphene-iron-doped titania nanowires are synthesized by dissolving 20-40 mg graphene oxide in solution of ethanol and distilled water in volume ratio of 1:3-1:1, ultrasonically processing for 1 hour, adding 2 g iron-doped titania nanowires to obtained solution, alternately ultrasonically agitating mixture for 80 minutes, alternately processing once every 20 minutes to obtain a homogeneous suspension, placing 100 mL suspension in polytetrafluoroethylene-lined reactor, reacting at 120 degrees C, rinsing with ethanol, filtering complex, drying and storing filtrate at room temperature. High-catalytic-activity visible-light-degradable graphene-iron-doped titania nanowires are prepared by adding 100 mg photocatalyst and 500 mL methylene blue solution with concentration of 10 mg/L to graphene-iron-doped titania nanowires, stirring for 60 minutes, degrading mixture with metal halide lamp at 400 W and distance of solution from light source is 15 cm, pipetting 5 mL solution every 20 minutes, centrifuging and detecting degradation of supernatant.