▎ 摘　　要

NOVELTY - Preparing a three-dimensional graphene oxide/indium oxide sensitive material acetone gas sensor involves preparing three-dimensional rGO/indium oxide sensitive material, weighing the graphene oxide (GO) dissolved in the anhydrous ethanol, continuously ultrasonic for 1.5 hours to obtain solution A, weighing indium nitrate, dissolving urea and sodium dodecyl sulfate in the mixed solvent of the volume ratio of 3-4 of the ethanol/distilled water to obtain solution B, mixing solution A and solution B and stirring for 0.5 hours, configured to hydrothermal synthesis precursor reaction solution, the hydrothermal synthesis precursor reaction solution into the stainless steel high-pressure kettle of polytetrafluoroethylene lining, keeping for 3 hours at 160 ℃, then naturally cooling to room temperature to obtain reaction product, centrifuging and separating the reacted solution to obtain the reaction product, using distilled water, repeatedly washing for 6 times. USE - Method for preparing a three-dimensional graphene oxide/indium oxide sensitive material acetone gas sensor. ADVANTAGE - The method has improved the high working temperature of the indium oxide gas sensor in acetone gas detection. DETAILED DESCRIPTION - Preparing a three-dimensional graphene oxide/indium oxide sensitive material acetone gas sensor involves preparing three-dimensional rGO/indium oxide sensitive material, weighing the graphene oxide (GO) dissolved in the anhydrous ethanol, continuously ultrasonic for 1.5 hours to obtain solution A, weighing indium nitrate, dissolving urea and sodium dodecyl sulfate in the mixed solvent of the volume ratio of 3-4 of the ethanol/distilled water to obtain the solution B, mixing the solution A and solution B and stirring for 0.5 hours, configured to hydrothermal synthesis precursor reaction solution, the hydrothermal synthesis precursor reaction solution into the stainless steel high-pressure kettle of the polytetrafluoroethylene lining, keeping for 3 hours at 160 ℃, then naturally cooling to room temperature to obtain the reaction product, centrifuging and separating the reacted solution to obtain the reaction product, using distilled water, repeatedly washing for 6 times alternately without ethanol, putting the reaction product after washing into a drying box at constant temperature, drying for 8 hours at 60 ℃, after drying, cooling, putting the dried reaction product into a clean crucible, putting it into a muffle furnace, calcining for 2 hours under the protection of nitrogen at 400 ℃, obtaining the three-dimensional rGO/In2O3 sensitive material, storing it in the drier to be analyzed and detected, manufacturing the gas sensor by the material, and detecting the acetone gas, taking the three-dimensional rGO/In2O3 composite material and grinding the solution ethanol slurry, coating it on the surface of aluminum oxide ceramic tube, making it completely cover the aluminum oxide ceramic tube and gold electrode, the heating wire passes through the aluminum oxide ceramic tube and the two ends are welded on the base, then the ceramic tube surface and the platinum wire lead connected with the gold electrode are welded on the measuring electrode of the base to obtain the gas sensor element, putting the prepared element on the table type gas-sensitive element aging table, aging for 2 days at 400 ℃, and using WS-30A gas-sensitive tester, the gas sensitive characteristics the test sensor, the test temperature is 50-250 ℃.