Preparation method and application of rare earth Ce doped ZnO nanosheet sensing material

The invention relates to a preparation method and application of a rare earth Ce doped ZnO nanosheet sensing material, and belongs to the field of gas sensing. According to the preparation method, sodium hydroxide is used as a solution to provide an alkaline environment, zinc acetate dihydrate is used as a Zn source, cerium nitrate hexahydrate is used as a doping agent to provide a Ce element, deionized water is used as a solvent, and Ce-ZnO prepared through the steps of mechanical stirring, microwave-assisted hydrothermal method synthesis, centrifugation, drying and the like is in a nanosheet shape. The sensor based on the Ce-doped ZnO nano material has good gas-sensitive property to acetone, and has high response, low detection limit, ideal stability and good selectivity. The response to 100 ppm acetone is 153, the lower detection limit is as low as 1 ppm, and the gas sensor shows relatively high stability in a 30-day irregular gas-sensitive test. The method is simple in preparation process, low in equipmen