▎ 摘　　要

NOVELTY - Preparing ionic liquid-modified nitrogen-sulfur co-doped graphene oxide composite material comprises (i) mixing graphene oxide with deionized water to form dispersion, mixing 1-aminopropyl-3-hydrocarbyl imidazole bromide, potassium hydroxide and graphene oxide dispersion, ultrasonically dispersing for 1-2 hours, refluxing the reaction at 40-80 degrees C for 12-36 hours, filtering the obtained solid, washing with ethanol and water respectively, and drying to obtain 1-aminopropyl-3-alkylimidazole bromide and graphene oxide (IL-GO-1), (ii) mixing the obtained product in step (i) with thiourea, adding solvent to dissolve it, magnetically stirring for 0.5-1 hour, placing the solution into a polytetrafluoroethylene-lined hydrothermal reactor, reacting at 160-200 degrees C for 3-6 hours, cooling to room temperature, filtering the obtained solid, washing with ethanol and water respectively, and then drying. USE - The composite material is useful for supporting the composite material on the cathode electrode as a catalyst (claimed). ADVANTAGE - The composite material: has excellent catalytic activity for oxygen reduction. DETAILED DESCRIPTION - Preparing ionic liquid-modified nitrogen-sulfur co-doped graphene oxide composite material comprises (i) mixing graphene oxide with deionized water to form dispersion, mixing 1-aminopropyl-3-hydrocarbyl imidazole bromide, potassium hydroxide and graphene oxide dispersion, ultrasonically dispersing for 1-2 hours, refluxing the reaction at 40-80 degrees C for 12-36 hours, filtering the obtained solid, washing with ethanol and water respectively, and drying to obtain 1-aminopropyl-3-alkylimidazole bromide and graphene oxide (IL-GO-1), where 100-200 ml deionized water is added for every 0.05-0.1 g graphene oxide, 0.1-0.2 g 1-aminopropyl-3-hydroxyimidazole bromide and 0.2-0.4 g potassium hydroxide are added per 100-200 ml graphene oxide dispersion, the 1-aminopropyl-3-hydrocarbylimidazole bromide salt is 1-aminopropyl-3-methylimidazole bromide salt or 1-aminopropyl-3-vinylimidazole bromide salt, (ii) mixing the obtained product in step (i) with thiourea, adding solvent to dissolve it, magnetically stirring for 0.5-1 hour, placing the solution into a polytetrafluoroethylene-lined hydrothermal reactor, reacting at 160-200 degrees C for 3-6 hours, cooling to room temperature, filtering the obtained solid, washing with ethanol and water respectively, and then drying to obtain composite material, the mass ratio between the obtained product and thiourea is 0.05-0.1:1.5-3, and 1.5-3 g thiourea is added per 50-100 ml of solvent.