▎ 摘　　要

NOVELTY - Preparation of nitrogen-doped graphene nanobelt-nano-cobalt tetroxide hybrid material comprises subjecting the original carbon nanotube to chemical radial shearing, obtaining graphene oxide nano-aqueous dispersion, taking graphene oxide nano-aqueous dispersion, adding cobalt salt, ultrasonically treating, adding ammonia water, continuously stirring to obtain uniform mixed solution, transferring to hydrothermal kettle, conducting one-step hydrothermal reaction, taking the black precipitates, washing with deionized water, and oven drying to obtain the product. USE - Preparation of nitrogen-doped graphene nanobelt-nano-cobalt tetroxide hybrid material (claimed) used as oxygen reduction reaction catalyst material. ADVANTAGE - The method provides graphene oxide nanobelt with large aspect ratio, and cobalt tetroxide nanoparticles, which are smaller in size and uniformly distributed on graphene nanobelt. DETAILED DESCRIPTION - Preparation of nitrogen-doped graphene nanobelt-nano-cobalt tetroxide hybrid material comprises subjecting the original carbon nanotube to chemical radial shearing, obtaining graphene oxide nano-aqueous dispersion, taking 15-25 ml graphene oxide nano-aqueous dispersion, adding 0.1-0.4 mmol cobalt salt, ultrasonically treating for 30-60 minutes, adding 2-4 ml ammonia water, continuously stirring for 10-15 minutes to obtain uniform mixed solution, transferring to hydrothermal kettle, conducting one-step hydrothermal reaction at 150-180 degrees C for 3-4 hours, taking the black precipitates, washing with deionized water for 3-5 times, and oven drying to obtain the product, where nano-cobalt tetroxide particles having particle size of 5-10 nm are uniformly distributed on nitrogen-doped graphene nanobelt. An INDEPENDENT CLAIM is included for nitrogen-doped graphene nanobelt-nano-cobalt tetroxide hybrid material.