The plasmon resonance of metal nanoparticles merits its application
such as plasmonic photocatalyst, because plasmonic metal
nanoparticles can strongly absorb light over a broad UV–visible-
NIR spectral range and thus can be used as a sensitizer to enhance
the absorption of large-bandgap photocatalysts [7,11,12]. Silver
chloride (AgCl) is one of the photosensitive semiconductor materials
with a direct bandgap of 5.15 eV (241 nm) and an indirect
bandgap of 3.25 eV (382 nm) [13]. Although AgCl photocatalysts
are typically activated with high energy ultraviolet (UV) light due
to large bandgaps, the deposition of Ag nanoparticles onto AgCl
photocatalyst or the partial conversion of AgCl to Ag can amplify