▎ 摘　　要

NOVELTY - Preparation of composite photocatalyst involves mixing cadmium sulfide nanoparticle-modified niobium pentoxide nanorod, nitrogen-doped graphene suspension and deionized water, centrifuging, washing resultant solid with deionized water, and drying. The cadmium sulfide nanoparticle-modified niobium pentoxide nanorod is prepared by ultrasonically dispersing niobium pentoxide nanorod in an alcohol solvent, adding cadmium ion-trapping agent, refluxing, cooling, adding cadmium acetate solution, stirring, adding sodium sulfide solution, stirring, reacting, filtering, washing and drying. USE - Preparation of cadmium sulfide nanoparticle-modified niobium pentoxide/nitrogen-doped graphene composite photocatalyst used in production of hydrogen (all claimed). ADVANTAGE - The method enables preparation of cadmium sulfide nanoparticle-modified niobium pentoxide/nitrogen-doped graphene composite photocatalyst with wide light response range, and high catalytic activity and stability, by simple process. DETAILED DESCRIPTION - Preparation of cadmium sulfide nanoparticle-modified niobium pentoxide/nitrogen-doped graphene composite photocatalyst involves mixing cadmium sulfide nanoparticle-modified niobium pentoxide nanorod, nitrogen-doped graphene suspension and deionized water in a mass ratio of 1:0.01-0.06:30-50, at room temperature for 1-3 hours, centrifuging, washing resultant solid with deionized water, and drying. The cadmium sulfide nanoparticle-modified niobium pentoxide nanorod is prepared by ultrasonically dispersing niobium pentoxide nanorod in an alcohol solvent, adding cadmium ion-trapping agent, refluxing for 2-5 hours, cooling to room temperature, adding cadmium acetate solution, stirring for 50-75 minutes, adding sodium sulfide solution, stirring for 50-75 minutes, adding obtained mixture to polytetrafluoroethylene-lined high-pressure reactor, reacting at 150-200 degrees C for 20-30 hours, performing suction filtration of reaction solution, washing with deionized water, and drying. The niobium pentoxide nanorod is prepared by ultrasonically dispersing niobic acid in a mixed solvent, stirring, adding obtained mixture to a polytetrafluoroethylene-lined high-pressure reactor, aging at 100-200 degrees C for 20-40 hours, performing suction filtration, washing with deionized water, drying, calcining solid at 400-700 degrees C and 5-20 degrees C/minute for 2-10 hours in a muffle furnace, and naturally cooling to room temperature. An INDEPENDENT CLAIM is included for application of cadmium sulfide nanoparticle-modified niobium pentoxide/nitrogen-doped graphene composite photocatalyst in production of hydrogen.