Synthesis, Characterization, and Photocatalytic Properties of BiVO4 Particles Prepared by a Co-precipitation Process
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Abstract
The Bismuth vanadate (BiVO4) particles were prepared by co-precipitation method from Bismuth (III) nitrate as starting precursors and nitric acid (HNO3 ) was selected as the solvent. The as-precipitated particles were calcinated at 200 °C, 300 °C, 400 °C, and 500 °C for 8 h. The influence of different calcination temperatures on structural, morphological, and photocatalytic properties of all samples was studied. The crystal structures were investigated by X-ray diffraction (XRD) and surface morphologies were observed by scanning electron microscope (SEM). The XRD results show the phases change of Tetragonal to Monoclinic and the SEM images show uniform structure with the significant agglomeration of BiVO4 particles when calcination temperature increases. Moreover, Photocatalytic testing was studied by decomposition of RhB dye solution with BiVO4 particles prepared at different calcination temperatures under visible light irradiation and the result exhibited that the product calcined at 400 °C performed better activity than the others that would be due to the existence of mixed phases of BiVO4 and high surface area.
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