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

Figure 4

(a) Fluorescence spectra of (A) TiO₂, (B) 0.01% Fe³⁺ doped nano-TiO₂, (C) 0.6% La³⁺ doped nano-TiO₂, and (D) 0.01% Fe³⁺/0.6% La³⁺ codoped nano-TiO₂; (b) fluorescence spectra of (A) 1.5% La³⁺, (B) 1.0% La³⁺, (C) 0.3% La³⁺, and (D) 0.6% La³⁺ doped nano-TiO₂, (c) fluorescence spectra of (A) 0.005% Fe³⁺, (B) 0.1% Fe³⁺, (C) 0.05% Fe³⁺, (D) 0.2% Fe³⁺, (E) 0.15% Fe³⁺, and (F) 0.01% Fe³⁺ doped nano-TiO₂; (d) fluorescence spectra of nano-TiO₂ codoped with (A) 0.15% Fe³⁺ and 0.6 % La³⁺, (B) 0.01% Fe³⁺ and 1.0% La³⁺, (C) 0.01% Fe³⁺ and 0.5% La³⁺, and (D) 0.01% Fe³⁺ and 0.6% La³⁺.

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