1.6493gNa2WO4 2H2O wasdissolvedin100mlreversedos-
mosis waterwithcontinuouslystirring,followedby4.8511gBi
(NO3)3 6H2O adding,andstirredfor30min.Subsequently,3M
NaOH wasaddedtothemixtureuntilachievingatthepH10.The
mixture washydrothermallyprocessedat180 °C for20h.To
synthesize AgnanoparticleswithdifferentloadingsonBi2WO6, 1 g
Bi2WO6 and 1,5and10wt%AgofAgNO3 weredissolvedin50ml
ethyleneglycolasanoxidizingsolvent.Thesolutionswererapidly
sonicated for10mintoformthe final products.
Tostudyphotocatalysis,a150mgphotocatalystwassuspended
in 150ml10–5 M RhBsolutionseach,stirredfor30mininthedark
and irradiatedbyXelamp.RhBconcentrationwasmeasuredby
UV–visible spectroscopyat554nmwavelength.Thedecoloriza-
tion efficiency wascalculatedasfollows: