Selective Adsorption and Photocatalytic Degradation of Dyes Using Polyoxometalate Hybrid Supported on Magnetic Activated Carbon Nanoparticles under Sunlight, Visible, and UV Irradiation

Figure 4

UV-Vis absorption spectra of MB (20 mg/L, 50 mL) during the adsorption on MAC (0.5 g/L) in the dark (a), the photodegradation under UV (b), the adsorption on MAC-HMT-STA-MB (0.5 g/L) in the dark (c), and changes in decolorization versus time (d).

(a)

(b)

(c)

(d)