A facile way to synthesize Ag@AgBr cubic cages with efficient visible-light-induced photocatalytic activity
•Novel Ag@AgBr cubic cages were first synthesized via SCT process.•The Ag@AgBr showed remarkably enhanced organic dyes degradation activity.•The SPR effect of silver particles promotes the charge transfer and separation.•The mechanism was proposed and confirmed by PL and ESR results.
The novel cubic cage Ag@AgBr plasmonic photocatalysts were first synthesized via a water soluble sacrificial salt-crystal-template (SCT) process. This is achieved by the photo-reduction process was used to produce Ag nanoparticles on the surface of AgBr. The physical and photophysical properties of the as-prepared Ag@AgBr cubic cages were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), energy dispersive spectroscopy (EDS), ultraviolet–visible diffuse reflection spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), electron spin resonance (ESR) and photoluminescence spectroscopy (PL). The results showed that Ag@AgBr cubic cages have excellent photocatalytic performance under visible light illumination, since the methyl orange (MO) dyes were completely degraded within 80 s over Ag@AgBr photocatalysts and the photocatalytic activity maintains a high level after 7 cycles. A possible catalytic mechanism for Ag@AgBr cubic cages is proposed which is attributed to the surface plasmon resonance (SPR) effect from Ag and hybrid effect from AgBr.
Graphical abstractThe novel Ag@AgBr cubic cage photocatalysts were synthesized for the first time, and the degradation mechanism of organic pollutants was also proposed.Figure optionsDownload full-size imageDownload as PowerPoint slide
Journal: Applied Catalysis B: Environmental - Volume 163, February 2015, Pages 564–572