Photocatalytic activity of BiFeO^sub 3^ in pellet form synthetized using solid state reaction and modified Pechini method

• Published in: Journal of photochemistry and photobiology. A, Chemistry. Chemistry., 2018-12, Vol.367, p.390
• Main Authors: Monteiro, Francielli Casanova, Cubas, Paloma de Jesus, Kosera, Vitor Sena, Monteiro, João Frederico Haas Leandro, Fujiwara, Sérgio Toshio
• Format: Article
• Language: English
• Subjects: Bismuth ferrite; Catalytic activity; Chemical reactions; Chemical synthesis; Degradation; Dyes; Field emission microscopy; Fourier transforms; Hydrogen peroxide; Infrared spectroscopy; Morphology; Photocatalysis; Photodegradation; Reflectance; Scanning electron microscopy; Solid state; Solid state physics; Spectroscopy; Tartrazine; Ultraviolet spectroscopy; X-ray diffraction
• ISSN: 1010-6030; 1873-2666
• DOI: 10.1016/j.jphotochem.2018.08.051

Bismuth Ferrite, BiFeO3, was synthesized using the solid state reaction and the Pechini method. The materials obtained were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), visible ultraviolet spectroscopy (UV-Vis) and field emission scanning electron microscopy (FEG). The microscopy showed that there are differences in morphology between the two synthesis and also the formation of pores obtained by the synthesis of the Pechini method. When using diffuse reflectance, a low bandgap value was obtained for the samples by both synthesis, 1.7 eV for the solid state reaction and 1.1 eV for the Pechini method. The materials synthesized through the two methods were effective for the degradation of the tartrazine dye reaching around 99% degradation, which was performed under optimized conditions and without the addition of H2O2. Lastly, it was found that there 3.5% of the dye was adsorbed in the solid state pellet.