Zirconium-doped perovskite type photocatalyst and preparation method thereof

The invention relates to a zirconium-doped perovskite type photocatalyst and a preparation method thereof. A perovskite type structure of the catalyst is a mixed crystal structure of an anatase phase and a rutile phase; a molecular formula of the catalyst is ABO3, wherein A is Sr and B is Ti; the doped zirconium ion is Zr. The preparation method comprises the following steps: preparing a glacial acetic acid solution, preparing a butyl titanate-absolute ethyl alcohol solution, reacting the two solutions, drying, calcining and grinding. The zirconium-doped perovskite type photocatalyst has high visible light photodegradation activity in a visible light waveband; because the reaction process is performed in the solution, reactants can be uniformly mixed on a molecular level, so that the synthesized catalyst is high in dispersity, high in purity and stable in performance.