COMPLEX OF COBALT SULFIDE/REDUCED GRAPHENE OXIDE AND USE THEREOF IN GAS SENSOR

Provided is a complex of cobalt sulfide/reduced graphene oxide and use thereof in a gas sensor. A preparation method for a complex of cobalt sulfide/reduced graphene oxide is as follows: preparing a glycerol-cobalt precursor by taking a water-soluble cobalt salt, a micromolecular alcohol solvent, and glycerol as raw materials; mixing the glycerol-cobalt precursor with an alkali liquor to prepare a Co(OH)2 nanoflower; calcining the Co(OH)2 nanoflower to obtain a Co3O4 nanoflower; subjecting the Co3O4 nanoflower to a reaction with a water-soluble sulfur salt to obtain a COS nanoflower, and mixing the COS nanoflower with graphene oxide and then carrying out a heat treatment to obtain the complex of cobalt sulfide/reduced graphene oxide. The response characteristics of a gas sensor to NO2 gas are studied at room temperature, and the graphene is complexed with the transition metal sulfide with unique morphology to construct a unique heterostructure. While expanding the specific surface area to increase the number