Photocatalytic Activity under Simulated Sunlight of Bi-Modified TiO₂ Thin Films Obtained by Sol Gel

Figure 2

Raman spectra of the TiO₂ thin films modified with several bismuth contents of (a) 0, (b) 0.5, (c) 4.9, (d) 10.4, (e) 21.5, and (f) 25.4 at. %.