▎ 摘　　要

NOVELTY - Acetone sensor based on ferric oxide nanoparticle sensitive material induced by reduced graphene oxide modified interface comprises aluminum oxide ceramic tube substrate with two parallel, ring-shaped and separate gold electrodes on outer surface, nano-sensitive material coated on outer surface of aluminum oxide ceramic tube and gold electrode and nickel-cadmium heating coil placed in aluminum oxide ceramic tube, where nano-sensitive material is ferric oxide nanoparticles induced by reduced graphene oxide modified interface and prepared by (1) adding 20-40 ml ethanol to 10-20 ml deionized water, dissolving 1.09 g ferric chloride hexahydrate, stirring, adding 1.06 g sodium acetate, stirring for 20-40 minutes, adding 1-3 wt.% aqueous graphene oxide and 0.25 wt.% graphene oxide, (2) reacting the solution at 150-180 degrees C for 8-12 hours and (3) cooling to room temperature, centrifuging, washing with water and ethanol, drying, calcining at 450-550 degrees C for 3-6 hours and reducing graphene oxide. USE - Used as acetone sensor based on ferric oxide nanoparticle sensitive material induced by reduced graphene oxide modified interface. ADVANTAGE - The material: realizes the improvement of the sensitivity of the device to acetone; modifies the detection limit of the device; reduces the operating temperature of the device; has fast response recovery speed, high sensitivity, low detection limit and good repeatability; and provides a new basis for graphene and semiconductor oxide material composite materials. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing acetone sensor based on ferric oxide nanoparticle sensitive material induced by reduced graphene oxide modified interface comprising (1) taking the reduced graphene oxide modified interface, evenly mixing with a small amount of ethanol to form a slurry, using brush to dip the slurry, coating the outer surface of the aluminum oxide ceramic tube with two parallel, ring-shaped and separate gold electrodes on the surface, completely covering the outer surface of the aluminum oxide ceramic tube and the gold electrode to obtain a nano-sensitive material with a thickness 15-30 mu m, (2) drying the ceramic tube coated with nano-sensitive materials in step (1) for 20-40 minutes, transferring to a muffle furnace, sintering at 180-220 degrees C for 1-3 hours, passing the nickel-cadmium heating coil with resistance value 30-40 Omega through the inner side of the aluminum oxide ceramic tube, using direct current to provide a suitable working temperature for the sensor and welding the prepared device on the side-heated hexagonal tube base and (3) aging the device for 5-7 days in an air environment at 150-300 degrees C and obtaining acetone sensor based on aluminum oxide nanoparticle sensitive material induced by reduced graphene oxide modified interface.