Patent ID: 10983101

Abstract:
Provided is an oxide semiconductor gas sensor with improved performance that senses selectively methylbenzene gases with high sensitivity. The gas sensor includes a gas sensing layer composed of palladium (Pd)-loaded cobalt oxide (Co3O4) nanostructures. The response of the gas sensor according to the present invention to xylene gas at a concentration as low as 5 ppm is at least 150 times higher than that to ethanol gas. The response of the gas sensor to toluene gas at a concentration as low as 5 ppm is at least 100 times higher than that to ethanol gas. In addition, the oxide semiconductor gas sensor has the ability to selectively detect methylbenzene gases, including xylene and toluene (with at least 30-fold higher response to xylene and at least 15 times higher response to toluene than that to ethanol gas).