Abstract
A highly efficient and stable photocatalyst Ag/Ag 3 PO 4 was prepared by the ion-exchange process between AgNO 3 and Na 2 HPO 4 and subsequently light-induced reduction route. The diffuse reflectance spectra (DRS) indicated Ag/Ag 3 PO 4 had strong absorption in UV and visible-light regions. The composite showed excellent visible-light-driven photocatalytic performance. It can decompose organic dye within several minutes and still maintain a high level activity even though used five times. It is considered that this excellent performance results from the surface plasmon resonance of Ag nanoparticles and a large negative charge of PO 4 3 − ions. ► Ag/Ag 3 PO 4 photocatalyst was synthesized by light-induced formation method. ► Content of Ag 0 reaches to 5.25% (mol %) after 2 hour irradiation. ► MB decomposition rate over Ag/Ag 3 PO 4 dozens of times quicker than over N-TiO 2 . ► It maintains a high level activity after recycling five times.
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