Abstract
The preparation of a series of ternary Ag/Ag 3 PO 4 /g-C 3 N 4 hybrid photocatalysts, which display enhanced photocatalytic activity, was reported. The crystal structure, morphology, composition, optical absorption, and efficient separation of charge carriers were studied by X-ray diffraction, scanning electron microscopy, absorption and photoluminescence spectroscopy measurements. Using rhodamine B as a model contaminant, the as-prepared Ag/Ag 3 PO 4 /g-C 3 N 4 hybrid photocatalyst exhibited superior degradation performance under visible light irradiation than Ag 3 PO 4 or binary Ag 3 PO 4 /g-C 3 N 4 hybrid photocatalyst systems. The surface plasmon resonance of the 40 nm-silver nanoparticles formed on the surface of Ag 3 PO 4 and the heterojunction formed at the interface between Ag 3 PO 4 and g-C 3 N 4 , are considered to be the major physical-chemical origin and to be responsible for the enhanced photocatalytic activity. Ternary Ag/Ag 3 PO 4 /g-C 3 N 4 photocatalyst exhibits excellent photocatalytic activity driven by visible light, attributed to surface plasmon resonance of 40 nm-silver nanoparticles formed on the surface of Ag 3 PO 4 , and the heterojunction at the interface between Ag 3 PO 4 and g-C 3 N 4 .
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