Fig. 5

XPS spectra; (a) survey and high-resolution scan of (b) Zn 2p, (c) O 1Â s, (d) Ag 3d of Ag/ZnO sample and (e) survey and high-resolution scan of (f) Zn 2p, (g) O 1Â s, (h) Cu 2p of Cu/ZnO sample.
XPS spectra; (a) survey and high-resolution scan of (b) Zn 2p, (c) O 1Â s, (d) Ag 3d of Ag/ZnO sample and (e) survey and high-resolution scan of (f) Zn 2p, (g) O 1Â s, (h) Cu 2p of Cu/ZnO sample.