▎ 摘　　要

NOVELTY - Preparing ionic liquid functionalized graphene oxide loaded tricobalt tetroxide nanoparticle composite material involves adding ionic liquid, 1-butyl-3-aminopropylimidazole bis-trifluoromethanesulfonimide salt, graphene oxide, and deionized water, performing ultrasonic dispersion for 10-60 minutes, magnetic stirring under the protection of nitrogen gas, constant temperature reflux at 25-50 degrees C for 24-36 hours to obtain product ionic liquid functionalized graphene oxide. The ratio of the ionic liquid to graphene oxide is 1:0.6-1:0.3. The 30-50mL deionized water is added for every 1-5g of ionic liquid. The ionic liquid functionalized graphene oxide, the oxidizing agent and the alkaline solution of divalent cobalt salt are added to a polytetrafluoroethylene-lined reactor at a constant temperature of 80 to 160 degrees C for 8 to 24 hours. USE - Method for preparing ionic liquid functionalized graphene oxide-supported tricobalt tetroxide nanoparticle composite material used as an oxygen reduction electrocatalytic electrode cathode material (claimed). ADVANTAGE - The method enables to prepare ionic liquid functionalized graphene oxide-supported tricobalt tetroxide nanoparticle composite material that has high efficiency and high quality and high current density. DETAILED DESCRIPTION - Preparing ionic liquid functionalized graphene oxide loaded tricobalt tetroxide nanoparticle composite material involves adding ionic liquid 1-butyl-3-aminopropylimidazole bis-trifluoromethanesulfonimide salt, graphene oxide and deionized water, performing ultrasonic dispersion for 10-60 minutes, magnetic stirring under the protection of nitrogen gas, constant temperature reflux at 25-50 degrees C for 24-36 hours to obtain product ionic liquid functionalized graphene oxide. The ratio of the ionic liquid to graphene oxide is 1:0.6-1:0.3. The 30-50mL deionized water is added for every 1-5g of ionic liquid. The ionic liquid functionalized graphene oxide, the oxidizing agent and the alkaline solution of divalent cobalt salt are added to a polytetrafluoroethylene-lined reactor at a constant temperature of 80 to 160 degrees C for 8 to 24 hours to obtain black solid product ionic liquid functionalized graphene oxide supported tricobalt tetroxide nanoparticle composite material. The ratio of ionic liquid functionalized graphene oxide, divalent cobalt salt and oxidant is 1:10-30:10-30. The alkaline solution is a sodium hydroxide solution with a mass fraction of 20-30% or an ammonia solution. Each 20-30mL alkaline solution contains 1-50g of divalent cobalt salt.