Abstract
This work focuses on the synthesis of phase-pure rhombohedral (R3c) nanocrystalline BiFeO3. The BiFeO3 nanoparticles were synthesized using the sol-gel method with propylene glycol as the complexing agent. The formation mechanism was investigated through thermal analysis and IR spectroscopy. The phase purity, crystal structure and nanocrystalline properties were studied using X-ray diffraction (XRD), Raman spectroscopy and transmission electron microscopy (TEM). The elemental composition and bonding states were analyzed with X-ray photoelectron spectroscopy (XPS). The XRD and Raman spectra confirmed the formation of pure and well-crystallized BiFeO3 nanoparticles at 400 ºC. The optical band gap, determined by UV-visible spectroscopy, was found to be 2.08 eV, indicating that the synthesized BiFeO3 nanoparticles could be an effective photocatalyst in the visible light region.
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