▎ 摘　　要

NOVELTY - Preparing cobalt-molybdate/nitrogen-functionalized graphene nano-complex comprises e.g. (1) preparing graphite oxide by chemical oxidation method and dispersing graphite oxide in deionized water by ultrasonic treatment to obtain graphene oxide dispersion, (2) adding nitrogen-containing substance to the graphene oxide dispersion liquid, stirring and mixing at room temperature, and then allowing to stand, pouring out the upper graphene oxide suspension, (3) pouring the graphene oxide suspension into hydrothermal reactor, adding cleaned current collector substrate into it, setting the hydrothermal reaction temperature to 120-150 degrees C and the reaction time to 8-10 hours, washing the sample with deionized water after the completion of the reaction and drying to obtain functionalized graphene on the substrate, (4) dissolving equal amounts of cobalt salts and molybdate in 50 ml deionized water, (5) stirring the mixed solution for 1-2 hours, mixing and transferring to the hydrothermal reactor. USE - The nano-sheet material is useful in super capacitors, lithium ion batteries, sensors, electronic devices, fuel cells, electrocatalysis and other fields. ADVANTAGE - The method: is simple, easy to implement, environmentally friendly and economical and has high yield. DETAILED DESCRIPTION - Preparing cobalt-molybdate/nitrogen-functionalized graphene nano-complex comprises (1) preparing graphite oxide by chemical oxidation method and dispersing graphite oxide in deionized water by ultrasonic treatment to obtain graphene oxide dispersion, (2) adding nitrogen-containing substance to the graphene oxide dispersion liquid, stirring and mixing at room temperature, and then allowing to stand, pouring out the upper graphene oxide suspension, (3) pouring the graphene oxide suspension into a hydrothermal reactor, adding cleaned current collector substrate into it, setting the hydrothermal reaction temperature to 120-150 degrees C and the reaction time to 8-10 hours, washing the sample with deionized water after the completion of the reaction and drying to obtain functionalized graphene on the substrate, (4) dissolving equal amounts of cobalt salts and molybdate in 50 ml deionized water, (5) stirring the mixed solution for 1-2 hours, mixing uniformly, then transferring to the hydrothermal reactor, adding current collector substrate with functional fossil inks, and setting the hydrothermal reaction temperature to 150-180 degrees C and the reaction time is 6-10 hours, washing the sample with deionized water and then drying and (6) placing the sample in a tube furnace and performing calcination at a temperature of 340-360 degrees C for 2-4 hours to obtain a cobalt-molybdate/nitrogen-functional graphene nano-complex. An INDEPENDENT CLAIM is also included for cobalt molybdate / nitrogen-functional graphene nano-complex comprising current collectors, nitrogen-functionalized graphene, and cobalt molybdate nano-sheets, where the nitrogen-functionalized graphene is directly growing on the current collector, and the cobalt molybdate nano-sheet material growing on the surface of nitrogen-functionalized graphene.