Mesoporous Na-alpha-MnO2 catalyst as well as preparation method and application thereof

The invention relates to the technical field of volatile organic compound catalytic purification, in particular to a mesoporous Na-alpha-MnO2 catalyst as well as a preparation method and application thereof. The invention discloses a preparation method of a Na-alpha-MnO2 catalyst and application of the Na-alpha-MnO2 catalyst in catalytic combustion of o-xylene, manganese salt and oxalate are precipitated and then subjected to a coordination reaction with citrate to obtain a MnC2O4 precursor; and preparing the mesoporous Na-alpha-MnO2 catalyst from the MnC2O4 precursor and sodium salt through a high-temperature solid phase method. The preparation method provided by the invention is simple, raw materials are simple, and reaction conditions are mild. The prepared catalyst product is uniform in morphology and good in dispersity, has rich mesoporous structures and oxygen vacancies, is beneficial to diffusion, adsorption and activation of reactant molecules, and shows good catalytic performance when being applied t