Ag<inf>3</inf>PO<inf>4</inf>@Ni<inf>3</inf>S<inf>2</inf> core/shell nanorod arrays for visible light degradation of organic contaminants

Key Words:Nickel compounds;Light - Nanorods - Organic pollutants - Photocatalytic activity - Photodegradation - Rhodium compounds - Silver compounds

Abstract:In this study, Ag<inf>3</inf>PO<inf>4</inf>@Ni<inf>3</inf>S<inf>2</inf> core/shell nanorod arrays on Ni foam substrate were fabrciated by a method of combining hydrothermal and in situ deposition. The resultant products were characterized by XRD, SEM, UV-vis, XPS and photocurrent response, respectively. The photocatalytic activity of Ag<inf>3</inf>PO<inf>4</inf>@Ni<inf>3</inf>S<inf>2</inf> were conducted by photodegradation rhodamine B (RhB) under visible light. The final results confirmed that the photocatalytic activity of Ag<inf>3</inf>PO<inf>4</inf>@Ni<inf>3</inf>S<inf>2</inf> samples show an obvious improvement compared with pure Ag<inf>3</inf>PO<inf>4</inf>. This enhanced performance could be attributed to the fact the charge recombination can be effectively suppressed and the photocorrosion effect of Ag<inf>3</inf>PO<inf>4</inf> can be inhibited as the photogenerated electrons on the conduction band of Ag<inf>3</inf>PO<inf>4</inf> can inject to Ni<inf>3</inf>S<inf>2</inf>. The maximum value of total removal rate were showed in Ag<inf>3</inf>PO<inf>4</inf>@Ni<inf>3</inf>S<inf>2</inf>-40 (where 40 represnsents the mass fraction of Ag<inf>3</inf>PO<inf>4</inf>), which were 2.12 times than pure Ag<inf>3</inf>PO<inf>4</inf>. More importantly, the Ag<inf>3</inf>PO<inf>4</inf>@Ni<inf>3</inf>S<inf>2</inf>-40 sample exhibits excellent stability under cyclic experiment. A plausible mechanism of photodegradation RhB over Ag<inf>3</inf>PO<inf>4</inf>@Ni<inf>3</inf>S<inf>2</inf> sample was also discussed.<br/> © 2019 IOP Publishing Ltd.

Volume:6

Issue:6

Translation or Not:no