Journal
ACS CATALYSIS
Volume 2, Issue 8, Pages 1677-1683Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cs300213m
Keywords
Ag; AgX; BiOX; SPR; Z-scheme
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Funding
- National Natural Science Foundation of China [20973128]
- open foundation of key laboratory of catalysis and materials science of the state ethnic affairs commission
- ministry of education, south-central university for nationalities
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Ag/AgX/BiOX (X = Cl, Br) three-component visible-light-driven (VLD) photocatalysts were synthesized by a low-temperature chemical bath method and characterized by X-ray diffraction patterns, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, and UV-vis diffuse reflectance spectra. The Ag/AgX/BiOX composites showed enhanced VLD photocatalytic activity for the degradation of rhodamine B, which was much higher than Ag/AgX and BiOX. The photocatalytic mechanisms were analyzed by active species trapping and superoxide radical quantification experiments. It revealed that metallic Ag played a different role for Ag/AgX/BiOX VLD photocatalysts, surface plasmon resonance for Ag/AgCl/BiOCl, and the Z-scheme bridge for Ag/AgBr/BiOBr.
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