BiFeO₃ perovskite as an efficient photocatalyst synthesised by soft chemical route

Bismuth ferrite nanostructure, BiFeO3, (BFO) belonging to perovskite family, was synthesised by a chemical route sintering temperature at 800°C for 6 h. The crystalline phase of the materials was investigated by X-ray diffraction (XRD). The morphology and particle size of the BFO samples were determined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis, respectively. The SEM images displayed the bimodal structure with the average grain size was found to be 0.6–3.7 µm. TEM observation confirmed the nanocrystalline nature of the particle having the size in the range of 50 ± 20 nm. We have been studied the charge storage capability and impedance of the BFO using cyclic voltammetry and electrochemical impedance spectroscopy, respectively. The prepared material demonstrates pseudocapacitive nature with a charge transfer resistance of 33 Ω. The synthesised material showed that the optical band gap value (Eg) of BiFeO3 varies between 2.2 eV.