▎ 摘　　要

NOVELTY - Preparing visible light mesoporous cuprous oxide/reduced graphene composite catalyst comprises dissolving F127 in ethanol, obtain colorless transparent solution, adding hydrated copper acetate and glucose, slowly adding sodium hydroxide solution, stirring, transferring the solution to high pressure reaction kettle, hydrothermal condition, cooling precipitate, drying under vacuum to prepare sample mesoporous cuprous oxide, adding ethanol into mesoporous cuprous oxide and graphene oxide solution in a quartz glass tube, ultrasonically processing, drying, centrifugally washing and drying. USE - The visible light mesoporous cuprous oxide/reduced graphene composite catalyst is useful in decomposing hydrogen. ADVANTAGE - The catalyst: regulates and control light for inhibition of photo-generated electron-hole pair of composite; has high quantum effect under visible light condition; has rapid effect in decomposing hydrogen production; has high recovery rate; does not cause secondary pollution; and is environmentally friendly. DETAILED DESCRIPTION - Preparation of visible light mesoporous cuprous oxide/reduced graphene composite catalyst comprises (a) preparing mesoporous cuprous oxide by (a1) using sol-gel method, dissolving 0.5-1 pts. wt. F127 in 20-40 ml ethanol, stirring in a magnetic stirrer at 700-900 revolutions per minute for 30 minutes, allowing to stand to completely dissolve F127 to obtain colorless transparent solution, (a2) adding 1-1.5 pts. wt. hydrated copper acetate and 1-1.5 pts. wt. glucose under strong stirring for 2 hours, stirring to completely dissolve the solution for colorless transformation into ink green and (a3) slowly adding 50 ml sodium hydroxide solution (12.5 M), stirring for 1 hour, transferring the solution to 100 ml high pressure reaction kettle, carrying out hydrothermal condition at a constant temperature of 50-70 degrees C for 24 hours, naturally cooling the reaction kettle to obtain red brown precipitate at bottom, drying sample at 50-80 degrees C under vacuum, drying in a tubular furnace under argon atmosphere by heating to 400 degrees C at a speed of 4 degrees C/minute for 2 hours to prepare sample mesoporous cuprous oxide and (b) preparing photocatalyst by photo-reduction method by placing mesoporous cuprous oxide and graphene oxide solution (0.1-0.5 mg/ml) into quartz glass tube, mixing, adding 50 ml ethanol, ultrasonically processing for half an hour at 500 W under mercury lamp under stirring for 6-8 hours by reduction to obtain mesoporous cuprous oxide/graphene solution, drying at a constant temperature of 50-70 degrees C under vacuum, centrifugally washing for multiple times with anhydrous ethanol, drying for 24 hours to obtain final product (mesoporous cuprous oxide/graphene-x), where graphene is added with different quantities through reduction and graphene oxide solution for adjusting, and x is amount of grapahene.