PVP-assisted Synthesis and Enhanced Photocatalytic Activity of Ag/Ag_3PO_4 Composites

摘要

In the present work, a highly active visible-light-driven Ag/Ag_3PO_4 photocatalyst was synthesized through a simple poly(vinylpyrrolidone) (PVP)-assisted precipitation method. It was found that the photodegradation activity of RhB over Ag/Ag_3PO_4 is superior to pure Ag_3PO_4 due to the combination of Ag nanoparticles. Study of the photocatalytic mechanism revealed that the degradation of RhB under visible light irradiation over the as-prepared Ag/Ag_3PO_4 is mainly via the direct hole oxidation mechanism. The Ag/Ag_3PO_4 photocatalyst keeps a high level of activity even though it is used for five times.