METHOD OF COPPER OXIDE-ZINC OXIDE/REDUCED GRAPHENE OXIDE COMPOSITE

The present invention relates to a method of preparing a copper oxide-zinc oxide/reduced graphene oxide composite for adsorbing hydrogen sulfide, and more particularly, to a preparing method with enhanced desulfurization efficiency by adjusting a ratio of copper oxide to zinc oxide. The present invention provides a method of preparing a copper oxide-zinc oxide/reduced graphene oxide composite, the method including the steps of: preparing graphene oxide in which graphite is oxidized with acid and oxidant and is exfoliated; mixing the graphene oxide with ethylene glycol and primarily dispersing the resultant mixed solution by using an ultrasonic vibration; mixing the mixed solution undergone the primary dispersion step with a sodium hydroxide (NaOH) aqueous solution and secondarily dispersing the resultant mixed solution with an ultrasonic vibration; adding a zinc acetate (ZnAc) aqueous solution and copper acetate (CuAc) to the mixed solution undergone the secondary dispersion step at a certain ratio and mixing the resultant mixed solution with a magnetic stirrer; adding a reducing agent to the mixed solution undergone the mixing with the magnetic stirrer step and heat treating the resultant mixed solution to perform reducing; and cooling and washing with distilled water the mixed solution undergone the heat treating and reducing step and drying the resultant mixed solution in a vacuum freeze dryer. According to the present invention, an agglomeration phenomenon of zinc oxide particles due to a high temperature is prevented and adsorption rate of the compound with respect to the compound is maximized by adjusting a ratio of copper oxide-zinc oxide in which an adsorption rate of hydrogen sulfide is best.