Shift the Photocatalytic Activity of P25 TiO₂ Nanoparticles toward the Visible Region upon Surface Modification with Organic Hybrid of Phosphotungstate

Figure 4

UV-Vis absorption spectra of RhB (15 mg/L, 100 mL, ) during the photodegradation under sunlight without photocatalyst (photolysis) (a), in the presence of TiO₂ (0.15 g/L) (b), in the presence of TiO₂-PTA-HMT-MB (0.1 g/L) (c), and / vs. time curves (d).

(a)

(b)

(c)

(d)