Abstract
A novel plasmonic photocatalysts of Ag/AgCl-Bi2MoO6 was successfully synthesized via a simple and mild wet-chemical process. The physical and photophysical properties of the as-prepared Ag/AgCl-Bi2MoO6 samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), Ultraviolet–visible diffuse reflection spectroscopy (DRS), electron spin resonance (ESR), photoluminescence emission spectra (PL) and surface photovoltage spectroscopy (SPV). The interaction between Ag/AgCl and Bi2MoO6 has been investigated by X-ray photoelectron spectroscopy (XPS) analysis, and which is facile to the electron transfer between Ag/AgCl and Bi2MoO6 and result in the enhancing photocatalytic activity of Ag/AgCl-Bi2MoO6 composite. The photocatalytic experiments indicate that the Ag/AgCl species can efficiently promote the separation efficiency of photo-generated charge carriers in Bi2MoO6, and consequently improve the RhB photodegradation activity. The 20wt% Ag/AgCl-Bi2MoO6 sample shows the highest photocatalytic activity, the degradation constant of 20wt% Ag/AgCl-Bi2MoO6 was as high as 4 times to that of pure Bi2MoO6. A possible catalytic mechanism for Ag/AgCl-Bi2MoO6 is proposed, which can be attributed to the surface plasmon resonance (SPR) effect from Ag/AgCl species.
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