▎ 摘　　要

NOVELTY - Preparing triiron tetraoxide load nitrogen-doped graphene compound material using urea iron comprises (i) taking urea, dissolving in water, adding 5-10-3 g/ml to 1x 10-2 g/ml concentrated graphene oxide solution, magnetic stirring, , (ii) taking iron, dissolving in ethanediol and urea, adding polyethylene pyrrolidone, magnetic force stirring to polyethylene pyrrolidone complete dissolution, (iii) taking urea iron ethanediol mixture liquid adding urea solution to the graphene oxide, stirring and vacuum drying . USE - The method is useful for preparing triiron tetraoxide load nitrogen-doped graphene compound material (claimed). DETAILED DESCRIPTION - Preparing triiron tetraoxide load nitrogen-doped graphene compound material using urea iron comprises (i) taking urea, dissolving in water, adding 5-10-3 g/ml to 1x 10-2 g/ml concentrated graphene oxide solution, magnetic stirring, mixing under power of 250 W, ultrasonic treatment for 2-12 hours, obtain urea and graphene oxide solution, the volume ratio of urea solution is 20g-70g:100 ml, the concentration of graphene oxide solution is 0.5-3:1, (ii) taking iron, dissolving in ethanediol and urea, adding polyethylene pyrrolidone, magnetic force stirring to polyethylene pyrrolidone complete dissolution, obtaining mixed liquid, regulating pH to 11 using saturated sodium hydroxide solution, mixing, urea iron ethanediol to obtain mixed liquid, volume ratio of mass and ethanediol and the urea iron is 1g:10 -50 ml, mass ratio of urea iron and polyethylene pyrrolidone is 1:0.05- 0.5, (iii) taking urea iron ethanediol mixture liquid adding urea solution to the graphene oxide, stirring mixing uniformly, mixing at 250 W, ultrasonic treatment under 2-12 hours to obtain primary mixture, the reaction kettle temperature is at 140-210 degrees C for 8-20 hours, cooling to room temperature, carrying out suction filtration, washing solid obtained with water, pumping filtering, vacuum drying at 30-80 degrees C, drying under 8-24 hours, obtaining ferroferric oxide loading be nitrogen doped graphene compound material, volume ratio solution of urea and the urea alkene iron ethanediol mixture liquid and graphene oxide is 1:3-6.