▎ 摘　　要

NOVELTY - Manufacturing mesoporous niobium pentoxide/graphene composite photocatalyst, comprises adding graphite into water, then adding sodium nitrate, sulfuric acid and potassium permanganate, placing in ice bath, adding deionized water, heating, adding the reaction solution into hydrogen peroxide and water, filtering, washing using hydrochloric acid and deionized water, drying, dissolving in deionized water, stirring, centrifuging, adding F127 copolymer, ethanol and niobium pentachloride into reaction solution, aging in a reaction kettle, adding hydrazine hydrate solution, calcining and cooling. USE - The method is useful for manufacturing mesoporous niobium pentoxide/graphene composite photocatalyst (claimed). ADVANTAGE - The method improves photocatalytic performance of niobium pentoxide, and suitable in the field of organic pollutants degradation and solar energy conversion. DETAILED DESCRIPTION - Manufacturing mesoporous niobium pentoxide/graphene composite photocatalyst, comprises: (i) adding 1 g graphite (less than 30 mu m) into 100 ml water, then adding 0.5 g sodium nitrate, 24 ml sulfuric acid and 3 g potassium permanganate, stirring ultrasonically for 10 minutes, placing the reaction solution in an ice bath, stirring vigorously for 30 minutes, taking out and stirring at 25 degrees C for 30 minutes, adding 46 ml deionized water to dilute the reaction solution, heating to 98 degrees C and continuously stirring for 10 minutes, adding the reaction solution into 10 ml hydrogen peroxide and 140 ml water, filtering the reaction solution, washing respectively using 5% hydrochloric acid and deionized water repeatedly for 3-5 times, drying the obtained product at 80 degrees C for 10 hours to obtain graphene oxide, dissolving certain amount of graphene oxide in deionized water before use to obtain 0.5 mg/ml solution, ultrasonically stirring for 2 hours, centrifuging at 1000 rotations/minute for 10 minutes, pipetting out supernatant and allowing it to stand; and (ii) adding 1 g F127 copolymer into 20 g absolute ethanol, stirring until clarification, simultaneously and slowly adding 5.5 mmol niobium pentachloride, stirring for 30 minutes, adding into graphene oxide solution in a mass ratio of 1:0.01-0.1, ultrasonicating for 20 minutes, continuing to stir for 30 minutes, then adding the reaction solution into polytetrafluoroethylene-lined reaction kettle, aging at 60 degrees C for 3 days, allowing the kettle to cool naturally, taking out the solution, adding proper amount of hydrazine hydrate solution, stirring at 40 degrees C for 24 hours to reduce graphene oxide to graphene, filtering, repeatedly washing the product using deionized water for 3-5 times, calcining the sample at 450 degrees C under argon atmosphere for 5 hours to remove F127 template, and to obtain the product.