Supported perovskite/cordierite catalyst as well as preparation method and application thereof

The invention belongs to the technical field of catalytic oxidation and water treatment, and provides a supported perovskite/cordierite catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: pretreating honeycomb cordierite, dissolving a soluble manganese salt, a soluble lanthanum salt and a complexing agent, and carrying out sol-gelation to obtain gel; and impregnating the pretreated honeycomb cordierite in the gel, taking out the impregnated carrier, and calcining. The supported perovskite/cordierite catalyst prepared by the method is a solid-phase catalyst, solid-liquid separation is simple, and the loss of the catalyst is low. According to the supported perovskite/cordierite catalyst prepared by the invention, in an organic wastewater environment, hydrogen peroxide can be quickly decomposed into hydroxyl free radicals, persulfate can be quickly decomposed into sulfate free radicals, and organic pollutants are degraded; and the addition amoun