▎ 摘　　要

NOVELTY - Preparation of molybdenum sulfide nanoparticle-modified mesoporous niobium pentoxide-nitrogen-doped graphene composite photocatalyst, involves dissolving F127 (RTM: nonionic surfactant polyol) in anhydrous ethanol, adding niobium(V) chloride, dripping calcium chloride solution, adding molybdenum ion trapping agent, dripping molybdenum acetate solution, adding sodium sulfide solution, molybdenum sulfide nanoparticle-modified mesoporous niobium pentoxide, nitrogen-doped graphene solution and ethanol to obtain final product. USE - Method for preparing molybdenum sulfide nanoparticle-modified mesoporous niobium pentoxide-nitrogen-doped graphene composite photocatalyst. ADVANTAGE - The method effectively expands the photopic response of niobium pentoxide range, reduces the photoelectron hole pairs of composite, improves photocatalytic activity, ensures large specific surface area and ordered pore structure, enhances photoelectron transfer rate, and enhances the visible light catalytic properties. DETAILED DESCRIPTION - Method for preparing molybdenum sulfide nanoparticle-modified mesoporous niobium pentoxide-nitrogen-doped graphene composite photocatalyst, involves (1) dissolving 1.0-2.0 pts. wt. F127 (RTM: nonionic surfactant polyol) in 20.0-40.0 pts. wt. anhydrous ethanol, magnetically stirring at 800-1000 rpm for 20 minutes, adding 5.5-11.00 mmol of niobium(V) chloride, mixing for 40 minutes, then dripping 0.5-1.0 mL of 0.5 mol/L calcium chloride solution, stirring for 20 minutes to obtain niobium(V) chloride sol, placing in PTFE lined autoclave, heating at 50-80 degrees C for 5-10 days, removing the reaction sol for cooling, calcining at 450 degrees C for 5-10 hours to obtain mesoporous niobium pentoxide, (2) ultrasonically dispersing 0.5-1.0 g mesoporous niobium pentoxide in anhydrous ethanol, adding 4.2-8.4 mmol molybdenum ion trapping agent, refluxing at 60-80 degrees C for 2-5 hours, cooling to room temperature, dripping 4 mg/mL molybdenum acetate solution, stirring for 1-2 hours, adding 25 mg/mL of 3-6 mL sodium sulfide solution, continuously stirring for 1-2 hours, heating at 180 degrees C for 1-2 days, filtering, washing with anhydrous ethanol, drying at 50-70 degrees C to obtain molybdenum sulfide nanoparticle-modified mesoporous niobium pentoxide, (3) adding 0.1-0.2 g molybdenum sulfide nanoparticle-modified mesoporous niobium pentoxide, 0.5 mg/mL nitrogen-doped graphene solution and 30-50 ml ethanol, ultrasonically processing for 1-3 hours, stirring for 6-10 hours, irradiating with 500 W mercury lamp, carrying out reduction reaction for 6-10 hours, washing with anhydrous ethanol, centrifuging, and drying at 50-70 degrees C to obtain molybdenum sulfide nanoparticle-modified mesoporous niobium pentoxide-nitrogen-doped graphene composite photocatalyst.