▎ 摘　　要

NOVELTY - Preparing nitrogen-sulfur co-doped titania/graphene quantum dot heterojunction material by one-step synthesis comprises e.g. (i) dissolving citric acid and thiourea in dimethyl formamide, (ii) adding titanium dioxide into the solution obtained in step (i) and stirring to obtain suspension, (iii) transferring the suspension obtained in step (ii) into a reaction kettle and reacting at 180 degrees C for 6 hours to obtain gray product by centrifugal separation, and (iv) washing the gray products obtained in the reaction in step (iii) and drying in vacuum to obtain final product. USE - The method is useful for preparing nitrogen-sulfur co-doped titania/graphene quantum dot heterojunction by one-step synthesis (claimed). ADVANTAGE - The material has excellent cycle stability. DETAILED DESCRIPTION - Preparing nitrogen-sulfur co-doped titania/graphene quantum dot heterojunction material by one-step synthesis comprises (i) dissolving citric acid and thiourea in the molar ratio of 2:1-1:3 in dimethyl formamide, where citric acid concentration is 12.5 mol/l, (ii) adding titanium dioxide into the solution obtained in step (i) and stirring to obtain suspension, where concentration of titanium dioxide is 15.6 mol/l, (iii) transferring the suspension obtained in step (ii) into a reaction kettle and reacting at 180 degrees C for 6 hours to obtain gray product by centrifugal separation, and (iv) washing the gray products obtained in the reaction in step (iii) and drying in vacuum to obtain final product.