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Photocatalytic activity of BiFeO3 in pellet form synthetized using solid state reaction and modified Pechini method

2018; Elsevier BV; Volume: 367; Linguagem: Inglês

10.1016/j.jphotochem.2018.08.051

1873-2666

Francielli Casanova Monteiro, Paloma de Jesus Cubas, Vitor Sena Kosera, João Frederico Haas Leandro Monteiro, Sérgio Toshio Fujiwara,

Advanced Photocatalysis Techniques

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.