▎ 摘　　要

NOVELTY - Preparing graphene oxide and titanium oxide nanoparticle composite material comprises (i) dissolving graphite oxide in deionized water, ultrasonic processing and separating the graphite oxide layer to obtain graphene oxide; (ii) mixing titanium dioxide with ultrasonic treated graphite oxide solution, magnetic stirring for 1 hour; (iii) pouring the obtained suspension into a reaction kettle, sealing and carrying out hydrothermal reaction at 120-180 degrees C for 4-8 hours; and (iv) washing the suspension with deionized water, centrifuging and drying. USE - The method is useful for preparing graphene oxide and titanium oxide nanoparticle composite material (claimed). ADVANTAGE - The method: is simple, economical and suitable for mass production, ensures easy operation, has high stability and repeatability; does not utilize additives and is environmentally friendly; and improves deposition or adhesion performance of titanium dioxide nanoparticles on a graphene oxide substrate. The composite material has good catalytic performance and degrades the dye even in a dark condition. DETAILED DESCRIPTION - Preparing graphene oxide and titanium oxide nanoparticle composite material comprises (i) dissolving graphite oxide in deionized water, where the concentration of graphite oxide solution is 0.66-2.67 g/l, ultrasonic processing for 30-60 minutes, where the ultrasonic power is 40-100 W and separating the graphite oxide layer to obtain graphene oxide; (ii) mixing titanium dioxide with ultrasonic treated graphite oxide solution, magnetic stirring for 1 hour, where the mass ratio of graphite oxide and titanium dioxide is 1-4:5; (iii) pouring the obtained suspension into a reaction kettle, sealing and carrying out hydrothermal reaction at 120-180 degrees C for 4-8 hours; and (iv) washing the suspension with deionized water, centrifuging and drying.