Research Article

Preparation and Photocatalytic Performance of Nano-TiO2 Codoped with Iron III and Lanthanum III

Figure 3

XPS spectra for different elements in (a) 0.01% Fe3+/0.6% La3+ codoped nano-TiO2, (b) 0.01% Fe3+ doped TiO2, (c) 0.6% La3+ doped TiO2, and (d) TiO2.
(a)
(b)
(c)
(d)