[Retracted] Highly Active Rare-Earth-Metal La-Doped Photocatalysts: Fabrication, Characterization, and Their Photocatalytic Activity

Figure 7

XPS spectra of pure and 1.0 wt% La-doped TiO₂: (a) survey spectrum of TiO₂ (b) Ti 2p (a = TiO₂; b = 1.0 wt% La-TiO₂) (c) O 1s (a = TiO₂; b = 1.0 wt% La-TiO₂), and (d) La 3d.

(a)

(b)

(c)

(d)