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Global warming and fuel crisis have drawn much attention to the utilization of CO2 and solar energy.Of particular interest in our research,we prepared strontium zirconate(SrZrO3)nanoparticles as photocatalysts to convert CO2 into value-added products.SrZrO3 nanoparticles were successfully synthesized via a sonochemical method and applied to the reduction of CO2.The samples were characterized by X-ray diffraction,Raman spectroscopy,scanning electron microscopy,BET measurement,X-ray photoelectron spectroscopy and UV-vis absorption spectroscopy.