Fabrication of Bismuth Vanadate (BiVO4) Nanoparticles by a Facile Route
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Monoclinic bismuth vanadate (m-BiVO4) has attracted many researchers as an advanced photocatalyst for hydrogen production via water splitting and degradation of organic contaminants. In this study, pure m-BiVO4 nanoparticles were fabricated by an easy reproducible solid state route at different temperatures (500 °C, 550 °C, 600 °C, 650 °C and 700 °C) for 2 h. The synthesized materials were characterized by X-ray Diffractometer where all the diffraction patterns reveal characteristic peaks corresponding to m-BiVO4 with space group C2/c. Obtained m-BiVO4 particles have the lattice parameters: a = 7.2477 Å, b = 11.6970 Å, c = 5.0900 Å and the volume of the unit cell is 309.23 (106 pm3). Fourier Transform Infrared spectroscopy exhibits formation of Bi–O bond in the prepared nano powders. Ultraviolet–Visible diffuse reflectance spectroscopy suggests that nanostructured BiVO4 particles possess strong energy absorption properties both in visible and ultraviolet region. The particles show red shift of band gap as the calcination temperature rises and possible reasons have been discussed. Energy-dispersive X-ray spectroscopy confirms presence of Bi, V, and O without any contaminant, while particle’s morphology was investigated using Field Emission Scanning Electron Microscope.
KeywordsMonoclinic bismuth vanadate Solid state reaction Nanoparticles Lattice strains
The authors would like to thank Department of Glass and Ceramic Engineering, Bangladesh University of Engineering and Technology (BUET) for providing assistance regarding characterization and preparation of the specimen.
Compliance with Ethical Standards
Conflict of interest
There is no conflict of interest in writing and publishing the manuscript.
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