The Preparation Of Bismuth Vanadate Photocatalyst And Its Photoelectric Properties

In this paper,the morphologies of two BiVO₄are mainly regulated.One is a dumbbell-shaped BiVO₄powder;Another one is BiVO₄one-dimensional array.The samples were characterized by field emission scanning electron microscopy?SEM?,X-ray diffraction?XRD?and UV-Visible absorption spectroscopy,Energy dispersive X-ray spectrometer?EDS?.The specific work mainly has the following several aspects.?1?The Cu₂S/BiVO₄ composite photocatalysts had been synthesised by a simple solution adsorption method.The results showed that the interface between BiVO₄and Cu₂S enhanced the separation efficiency of photogenerated charge carriers,thus,the photocatalytic activitie of Cu₂S/BiVO₄composites was enhanced.?2?BiVO₄ photocatalysts with different Ba²⁺doping amount were prepared by hydrothermal method.The experimental results show that Ba²⁺may replace the position of Bi³⁺in the unit cell,which not only leads to the change of BiVO₄ crystal structure,but also improves the photocatalytic activity of BiVO₄.?3?A monocline BiVO₄ one-dimensional array with[010]oriented growth was prepared by hydrothermal method.The results show that the BiVO₄one-dimensional array has a smaller charge transfer resistance and a higher carrier density than BiVO₄ films.