The application relates to a
bismuth ferrite-
indium zinc sulfide-silver composite catalyst driven by ultrasonic and visible light, and a preparation method and application thereof, wherein the preparation method comprises the following steps: S1. hollow
bismuth ferrite core preparation: taking
bismuth nitrate and iron
nitrate as raw materials, adding a
solvent, heating to obtain a precursor
powder, calcining the precursor
powder to obtain a crude product, and washing and
drying the crude product to obtain the hollow
bismuth ferrite core; S2. shell-core type
bismuth ferrite-
indium zinc sulfide heterojunction preparation: taking
zinc chloride,
indium chloride and
thioacetamide as raw materials, adding a
solvent, adding the hollow
bismuth ferrite after mixing, dispersing, heating and reacting to obtain the shell-core type bismuth ferrite-indium
zinc sulfide heterojunction; and S3. composite catalyst preparation: dispersing the
heterojunction powder into a
solvent, adding
silver nitrate, mixing in the dark, heating and reacting, collecting the precipitate, washing and
drying the precipitate, heating and stirring the precipitate in
acetone, filtering, and
drying to obtain the composite catalyst. The composite catalyst can form an inner core piezoelectric field, a heterojunction interface and an outer layer Mott-Schottky potential barrier, realizes ultrasonic and visible light dual-energy driving, activates
persulfate and degrades organic pollutants.