▎ 摘　　要

NOVELTY - Preparation of gold nanoparticle-modified reduced graphene oxide/ferric oxide material involves dispersing ferric chloride hexahydrate in deionized water, adding 0.5 g/L graphene oxide aqueous solution, stirring at 500 rpm for 10 minutes, ultrasonically processing for 30 minutes, hydrothermally reacting at 160degrees Celsius for 18 hours to obtain reduced graphene oxide/ferric oxide (A), dispersing material (A) in water, transferring obtained solution to a transparent glass bottle, adding chloroauric acid and n-octadecanethiol, stirring at 200 rpm for 5 minutes in dark, and illuminating obtained solution using a xenon light with output power of 150 W for 2 minutes. The mass ratio of ferric chloride hexahydrate and graphene oxide is 4:1. The mass ratio of chloroauric acid, n-octadecanethiol, and material (A) is 1:2:2. USE - Preparation of gold nanoparticle-modified reduced graphene oxide/ferric oxide composite material used for preparing sensor (all claimed) for detecting nitrogen dioxide gas. ADVANTAGE - The gold nanoparticle modified iron oxide/reduction oxidation material graphene has excellent electrical conductivity and mechanical flexibility. The ferric oxide particles and gold nano particles provide more active sites for the adsorption of nitrogen dioxide on the graphene surface, which improves the specific surface area, at the same time, the ohmic contact formed between the two and the graphene promotes the transmission of the electron, therefore, it greatly improves the response ability of the reducing graphene material to the nitrogen dioxide. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for application of the gold nanoparticle-modified reduced graphene oxide/ferric oxide composite material in preparation of a sensor for detecting nitrogen dioxide gas.