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<p>Cobalt-doped bismuth ferrite (Bi<sub>1-x</sub>Co<sub>x</sub>FeO<sub>3</sub>) nanoparticles (NPs) at <i>x</i> = 0.00, 0.03, 0.07 were synthesized using the sol–gel auto-combustion method and studied the influence of cobalt (Co) on structural, surface, chemical, optical, magnetic, and photocatalytic properties on Bi<sub>1-x</sub>Co<sub>x</sub>FeO<sub>3</sub> nanoparticles. X-ray diffraction (XRD) studies revealed the rhombohedral structure of the synthesized nanoparticles with a mean crystallite size of 51&#xa0;nm. Using Tauc’s relation, the optical band gap was calculated, and it decreased from 2.13 to 1.6&#xa0;eV with increased Co concentration. The iron-oxygen (Fe–O) stretching vibrations were confirmed from Fourier transform infrared (FT-IR) spectra. Magnetic properties of the nanoparticles were studied using a vibrating sample magnetometer and found that Bi<sub>1-x</sub>Co<sub>x</sub>FeO<sub>3</sub> nanoparticles are ferromagnetic at room temperature. The strength of magnetization increased with an increase of Co doping concentration. Photocatalytic properties of the Bi<sub>1-x</sub>Co<sub>x</sub>FeO<sub>3</sub> nanoparticles were studied using a UV–Vis-NIR spectrophotometer, and it was found that Bi<sub>1-x</sub>Co<sub>x</sub>FeO<sub>3</sub> nanoparticles can be used as a photocatalyst in the visible region of the spectrum. Methyl blue (MB) dye was used to study the dye degradation property of pure and Co-doped BiFeO<sub>3</sub> nanoparticles, and the results were explained in detail. The Bi<sub>1-x</sub>Co<sub>x</sub>FeO<sub>3</sub> nanoparticles at <i>x</i> = 0.07 exhibited the highest photocatalytic activity&#xa0;(97.9%).</p>

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Structural, Magnetic, and Dielectric Properties of Bi1-xCoxFeO3 Nanoparticles for Photocatalytic Application

  • 期刊论文

  • 发表日期：

    2025年1月9日

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  • Ranjith Anburaja,
  • Shaik Kaleemulla

摘要

Cobalt-doped bismuth ferrite (Bi1-xCoxFeO3) nanoparticles (NPs) at x = 0.00, 0.03, 0.07 were synthesized using the sol–gel auto-combustion method and studied the influence of cobalt (Co) on structural, surface, chemical, optical, magnetic, and photocatalytic properties on Bi1-xCoxFeO3 nanoparticles. X-ray diffraction (XRD) studies revealed the rhombohedral structure of the synthesized nanoparticles with a mean crystallite size of 51 nm. Using Tauc’s relation, the optical band gap was calculated, and it decreased from 2.13 to 1.6 eV with increased Co concentration. The iron-oxygen (Fe–O) stretching vibrations were confirmed from Fourier transform infrared (FT-IR) spectra. Magnetic properties of the nanoparticles were studied using a vibrating sample magnetometer and found that Bi1-xCoxFeO3 nanoparticles are ferromagnetic at room temperature. The strength of magnetization increased with an increase of Co doping concentration. Photocatalytic properties of the Bi1-xCoxFeO3 nanoparticles were studied using a UV–Vis-NIR spectrophotometer, and it was found that Bi1-xCoxFeO3 nanoparticles can be used as a photocatalyst in the visible region of the spectrum. Methyl blue (MB) dye was used to study the dye degradation property of pure and Co-doped BiFeO3 nanoparticles, and the results were explained in detail. The Bi1-xCoxFeO3 nanoparticles at x = 0.07 exhibited the highest photocatalytic activity (97.9%).