Exploring the Structural, Morphological, Optical, and Dielectric Properties, along with Photocatalytic Performance of La-Doped SrFeO3 Nanofibers

This research focuses on the enhancement of photocatalytic properties in La-doped SrFeO3 nanofibers which were successfully synthesized using the electrospinning technique, with lanthanum concentrations (x = 0.0, 0.1, 0.3, 0.5, and 0.7). The doping effect on the structural, morphological, optical and dielectric characteristics was studied using X-ray diffraction, Scanning Electron Microscopy, Fourier Transform Infrared spectroscopy, UV–Visible spectroscopy and LCR meter. Also, the influence of distance (from tip to collector) on the diameter of the nanofibers is discussed. X-ray diffraction (XRD) analysis and the Rietveld refinement process validated the successful development of ferrite structures. The band gap decreased from 2.70 to 2.60 eV as the doping concentration increased. The dielectric constant has maximum value of 195.1 × 103 for x = 0.7 concentration. The highest level of photocatalytic activity at about 82% was observed for x = 0.7 concentration. These nanofibers can be used for applications in sensors, microwave-absorbing devices, and photocatalysis.