Figure 6

(a) Time-evolved photocatalytic degradation of MB under visible light irradiation, (b) Rate of chemical kinetics of the m-BiVO4 over photocatalytic MB degradation, (c) UV–Vis absorption spectra of the MB dye degradation by the recycled BiVO4 at successive time intervals during photocatalysis (Inset, photograph of the (A) 20 ppm MB solution and (B) 20 ppm MB treated solution), (d) Bar diagram of recycled runs of m-BiVO4 photocatalyst showing the MB dye degradation efficiency.