▎ 摘　　要

NOVELTY - Preparation of reduced graphene oxide-ferric oxide nanocomposites, involves dissolving sodium hydroxide and ferric chloride in water, carrying out solid-liquid separation, washing resulting solid product with deionized water and ethanol to obtain ferric oxide nanomaterials, adding aminopropyl triethoxysilane to obtain mixed solution, ultrasonically dispersing graphene oxide colloidal solution in mixed solution, carrying out hydrothermal reaction, washing precipitate with deionized water and absolute ethanol and freeze drying to obtain final product. USE - Method for preparing reduced graphene oxide-ferric oxide nanocomposites for chemical catalytic application and photocatalyst gas sensor. ADVANTAGE - The method enables simple and economical preparation of reduced graphene oxide-ferric oxide nanocomposites with high yield and small grain size. DETAILED DESCRIPTION - Method for preparing reduced graphene oxide(rGO)-ferric oxide(Fe2O3) nanocomposites, involves (1) dissolving 1-5 mol/L concentration of sodium hydroxide and 1-5 mol/L concentration of ferric chloride in 50 ml water, controlling the molar ratio of ferric chloride and sodium hydroxide to 1:3, mixing, stirring at 75 degrees C for 5 minutes, aging at 100-200 degrees C for 96 hours, centrifuging, carrying out solid-liquid separation, washing the resulting solid product with deionized water and ethanol to obtain ferric oxide nanomaterials, (2) ultrasonically dispersing ferric oxide nanomaterials in 50 ml ethanol solution, adding aminopropyl triethoxysilane, stirring at 60 degrees C for 4 hours, washing the precipitate, centrifuging with ethanol, drying at 60 degrees C, controlling the volume ratio of ferric oxide at 1-2 mg/mL, controlling the molar ratio of ferric oxide and aminopropyl triethoxysilane at (100-200):1, (3) ultrasonically dispersing graphene oxide in 80 mL deionized water to obtain graphene oxide colloidal solution, ultrasonically dispersing 0.05-0.2 mg/mL concentration of graphene oxide colloidal solution for 30 minutes, transferring the resulting solution to reaction kettle, carrying out hydrothermal reaction at 120 degrees C for 14 hours, washing the precipitate with deionized water and absolute ethanol, freeze drying at -50 degrees C for 24 hours to obtain final product. The mass ratio of graphene oxide and ferric oxide is 1:(5-10).