▎ 摘　　要

NOVELTY - Preparation of nano nitrogen-doped titanium dioxide nanotube/reduction-oxidation graphene composite with visible light catalyzing performance comprises: (1) dissolving urea into sodium hydroxide solution, adding graphene oxide and ultrasonically dispersing to obtain mixed solution-A; (2) adding titanium dioxide powder into mixed solution-A, ultrasonically dispersing and continuously stirring to obtain mixed solution-B; (3) adding mixed solution-B into reaction kettle and subjecting into hydrothermal reaction to obtain reaction solution; (4) cooling obtained reaction solution at room temperature, pouring into reaction kettle to obtain precipitate and washing obtained precipitate with water to neutralize and washing with acid to obtain product; and (5) drying obtained product into blast drying box and heating into vacuum drying box at high temperature. USE - Method for preparing nano nitrogen-doped titanium dioxide nanotube/reduction-oxidation graphene composite with visible light catalyzing performance. ADVANTAGE - The method has greatly widened titanium dioxide photo-catalysis field application and good application prospect.