Preparation method for efficiently improving catalytic oxidation of ethyl acetate by perovskite material

The preparation method comprises the following steps: S1, dissolving lanthanum nitrate, cerium nitrate, manganese nitrate and cobalt nitrate in deionized water, stirring at room temperature for 30 minutes, adding citric acid, complexing, heating, continuously stirring to form uniform wet sol, and then putting the wet sol in a blast oven for drying to obtain a precursor; a loose and porous perovskite precursor is obtained; s2, grinding the precursor obtained in the step S1, putting the precursor into an alumina crucible with a cover, roasting the alumina crucible in a muffle furnace, and annealing to obtain the perovskite catalyst, s3, filling a quartz tube with the catalyst obtained in the step S2 for fixed bed reaction, starting 100 ppm ethyl acetate standard gas from a steel cylinder, enabling the ethyl acetate standard gas to enter a catalyst fixed bed layer for catalytic oxidation reaction, and discharging tail gas subjected to catalytic oxidation from the tail end of the quartz tube to enter a gas chroma