Decolorization of Methylene Blue by Ag/SrSnO₃ Composites under Ultraviolet Radiation

Figure 2

XPS spectra of (a) 10 wt% Ag/SrSnO₃, (b) Ag3d, (c) Sn3d, and (d) Sr3d.

(a)

(b)

(c)

(d)