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

Figure 5

(a) UV-Vis absorption spectra of nano-TiO₂ doped with (A) 0.1% Fe³⁺, (B) 0.15% Fe³⁺, (C) 0.2% Fe³⁺, (D) 0.05% Fe³⁺, and (E) 0.01% Fe³⁺, and (F) pure TiO₂; (b) UV-Vis absorption spectra of nano-TiO₂ doped with (A) 0.6% La³⁺, (B) 0.5% La³⁺, (C) 0.7% La³⁺, (D) 0.3% La³⁺, (E) 1.0% La³⁺, (F) 1.5% La³⁺, and (G) pure TiO₂.

(a)

(b)