Abstract
Novel visible-light-driven Ag/AgCl/Bi2Zr2O7 plasmonic photocatalysts were successfully synthesized through a two-step process. Bi2Zr2O7 nanosheets were firstly prepared via a precipitation-calcination method, and Ag/AgCl nanoparticles were deposited on the surface of Bi2Zr2O7 nanosheets by an ultrasonic-assisted precipitation-photoreduction technique. The composition, phase structures, morphologies and optical properties of the Ag/AgCl/Bi2Zr2O7 catalysts were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), UV–vis diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS). The results showed that the Ag ions were finally formed on the surface of AgCl by in situ photoreaction. The visible-light photocatalytic activity of the as-prepared samples was investigated by the degradation of methyl orange aqueous solution. Compared to Bi2Zr2O7, the Ag/AgCl/Bi2Zr2O7 photocatalysts showed superior photocatalytic activities, which sould be attributed to the high specific surface area of the catalysts, the surface plasmon resonance effects of Ag and the formation of a heterostructure between Ag, AgCl and Bi2Zr2O7. It would provide a promising candidate material for environment remediation.
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