Investigation of Fe-Doped Graphitic Carbon Nitride-Silver Tungstate as a Ternary Visible Light Active Photocatalyst

Figure 5

XPS (a) survey spectrum and (b) atomic percentage of various elements in Fe–CN, CN-AW, and Fe-CN-AW; (c) O1s functional groups for (i) Fe–CN, (ii) CN-AW, and (iii) Fe-CN-AW.

(a)

(b)

(c)