Figure 8

Spectral patterns of the methylene blue solution during the photocatalytic reduction process in the presence of the V-Ti-2/FCC sample for 120 min. (inset shows the photographs of methylene blue solution: the 0 min, 20 min, 40 min, 60 min, 80 min, 100 min and 120 min, which corresponds with (a–g) respectively).