Abstract
<p>Polyhedral BiVO<sub>4</sub> was prepared by hydrothermal-calcination two-step method. The physicochemical properties of polyhedral BiVO<sub>4</sub> were characterized by XRD, TG/DTA, SEM and UV-vis DRS. The photocatalytic properties of the samples were investigated by using 10 mg/L methylene blue (MB) as the target degradant. The experimental results showed that the prepared polyhedral BiVO<sub>4</sub> is monoclinic. The morphology is about 10 μm polyhedral block. The pure phase BiVO<sub>4</sub> has strong visible light absorption capacity. Under visible light irradiation, the prepared BiVO<sub>4</sub> can degrade 90% of MB within 40 min. Moreover, the photocatalytic performance was further improved by forming a BiVO4/BiOCl heterojunction, and the kinetic reaction rate was 1.5 times that of the pure phase BiVO<sub>4</sub></p>
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