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

Figure 7

UV-Vis absorption spectra of RhB (20 mg/L, 20 mL, pH = without adjustment = 7.4) (a) and the mixed solution of RhB and MB (each dye 10 mg/L, total volume = 40 mL, pH = without adjustment) (b) during the adsorption on 0.47 g/L and 0.23 g/L of MAC-HMT-STA-MB, respectively, in the dark; spectra of the mixed solution of RhB (8 mg/L) and MB (45 mg/L, total volume = 50 mL) during the photodegradation under sunlight in the presence of the MAC-HMT-STA-MB (0.44 g/L) in the pH = 7.6 (without adjustment) (c) and pH = 2.5 (d) and corresponding digital images of the mixed solutions before and after irradiation.

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