▎ 摘　　要

NOVELTY - Preparing cadmium(II) sulfide/cerium(IV) oxide/bismuth molybdenum oxide/graphene oxide composite material comprises (i) taking mixed solution of cerium(III) nitrate and urea dissolved in ethanol and water, stirring, hydrothermally reaction, cooling, filtering, washing, collecting solid particles, drying, calcining, (ii) taking graphene oxide and adding into ethanol, dispersing, then taking bismuth(III) nitrate pentahydrate and dissolving it in ethylene glycol, then adding sodium molybdate dihydrate, adding to the graphene oxide solution, stirring, adding the product obtained in step (i) and citric acid, adjusting the pH, transferring mixed solution into polytetrafluoroethylene high-pressure reactor, hydrothermally reacting, cooling, centrifuging the obtained precipitate, washing, drying and (iii) taking the product obtained in step (ii) and dispersing in deionized water, adding thiourea and cadmium(II) acetate successively, stirring, reacting, cooling, separation, washing and drying. USE - The cadmium(II) sulfide/cerium(IV) oxide/bismuth molybdenum oxide/graphene oxide composite material is useful for photocatalytic reduction of carbon dioxide (claimed). DETAILED DESCRIPTION - Preparing cadmium(II) sulfide/cerium(IV) oxide/bismuth molybdenum oxide/graphene oxide (CdS-CeO2/Bi2MoO6/GO) composite material comprises (i) taking mixed solution of cerium(III) nitrate and urea dissolved in ethanol and water, stirring for 30 minutes and placing in an reaction kettle for hydrothermal reaction, cooling the product to room temperature, taking out and filtering, washing with distilled water until the pH of the filtrate is 7, collecting the solid particles, drying at 90 degrees C for 2 hours and calcining to obtain the product, (ii) taking graphene oxide and adding into ethanol, dispersing it ultrasonic for 1 hour, then taking bismuth(III) nitrate pentahydrate (Bi(NO3)3.5H2O) and dissolving it in ethylene glycol, then adding sodium molybdate dihydrate (Na2MoO4.2H2O), adding it to the graphene oxide solution, magnetically stirring continuously for 1 hour, adding the product obtained in step (i) and citric acid, adjusting the pH of the solution to 6 with concentrated aqueous ammonia, then magnetically stirring continuously at 80 degrees C for 2 hours, transferring the mixed solution to a polytetrafluoroethylene high-pressure reactor, hydrothermally reacting, it is naturally cooling to room temperature after completing the reacting, centrifuging the obtained precipitate, washing with water and ethanol for 3 times and then drying in vacuum at 60 degrees C overnight and (iii) taking the product obtained in step (ii) and dispersing it in 50 ml of deionized water, adding thiourea and cadmium(II) acetate successively, stirring vigorously at room temperature for 30 minutes, transferring the mixed solution into a polytetrafluoroethylene reaction kettle, hydrothermally reacting and reacted at a constant temperature of 160 degrees C for 12 hours, naturally cooling to room temperature after completing the reaction, carrying out centrifugal separation, washing with water for 3 times and drying at 60 degrees C for 12 hours.