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Visiblelight responsive photocatalyst BiVO4 were synthesized by simple precipitation method, following by calcination process. The phase structure, morphology, specific surface area and optical absorption properties of as-synthesized BiVO4 were characterized by XRD, SEM, BET, UV-Vis DRS and FTIR, respectively. Acid Black 10B was used as simulated dye wastewater to investigate the photocatalytic activity of BiVO4. The results indicate that the samples obtained under different calcination temperature are all monoclinic phase BiVO4. The band gap energy of BiVO4 calcined at 500 °C, 600 °C, 700 °C are 2.50 eV, 2.45 eV and 2.37 eV, respectively. BiVO4 calcinated at 500 °C or 600 °C show excellent photocatalytic activity, and the particles are sphericallike in shape. When the concerntration of dye is 20 mg/L, the dosage of BiVO4 is 200 mg/50 mL, visible light is used as irradiation source and reaction time is 60 min, the degradation rate of the dye can reach to about 100%. The degradation process can be considered as the first-order reaction kinetics.

Synthesis of Monoclinic scheelite BiVO4 by Simple Precipitation Method and Photocatalytic Performance under Visible-light Irradiation