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Abstract <p>A series of cobalt-doped strontium hexaferrite (SHF) nanoparticles with various compositions was fabricated via the microemulsion method in the present investigation. The effect of doping on the optical, structural, morphological, dielectric, optical and photocatalytic properties of synthesized materials was investigated, which were characterized by XRD, Fourier transform infrared (FTIR), Raman and scanning electron microscopy (SEM) techniques. The results revealed the formation of a hexagonal structure with a&#xa0;mean crystallite size in the 10.25–13.4 nm range. The dielectric and optical properties were significantly improved with an increase in Co dopant in the hexaferrite lattice. BET curves showed an enhanced surface area in the SHF/C5 composition compared to pure SHF. The photocatalytic activity (PCA) of pure SHF and highly doped SHF/C5 was studied for the removal of methyl red (MR) dye under visible light irradiation at 100 minutes intervals time. The SHF/C5 catalyst showed a significantly higher removal (91%) of dye compared to pure SHF (63%) for the same exposure time of irradiation. Recyclability tests of the SHF/C5 photocatalyst showed only a minor loss in its catalytic activity (only 2%) even after four consecutive cycles. The outcomes revealed that co-doping significantly improved the catalytic properties of SrFe<sub>12</sub>O<sub>19</sub>, signifying its application in harvesting solar light for the photocatalytic removal of organic dyes from industrial wastewater.</p>

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Co-doped Strontium Hexaferrite (SrCoxFe12–xO19) Nanoparticles for Photocatalytic Degradation of Methyl Red Dye Degradation

  • 期刊论文

  • 发表日期：

    2025年4月24日

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  • Ismat Bibi,
  • Farzana Majid,
  • Qasim Raza,
  • Shagufta Kamal,
  • Kashif Jilani,
  • Shazia Nouren,
  • Shaista Fayyaz,
  • Norah Alwadai,
  • Manikandan Ayyar,
  • Rajendra Patil,
  • Munawar Iqbal

摘要

Abstract

A series of cobalt-doped strontium hexaferrite (SHF) nanoparticles with various compositions was fabricated via the microemulsion method in the present investigation. The effect of doping on the optical, structural, morphological, dielectric, optical and photocatalytic properties of synthesized materials was investigated, which were characterized by XRD, Fourier transform infrared (FTIR), Raman and scanning electron microscopy (SEM) techniques. The results revealed the formation of a hexagonal structure with a mean crystallite size in the 10.25–13.4 nm range. The dielectric and optical properties were significantly improved with an increase in Co dopant in the hexaferrite lattice. BET curves showed an enhanced surface area in the SHF/C5 composition compared to pure SHF. The photocatalytic activity (PCA) of pure SHF and highly doped SHF/C5 was studied for the removal of methyl red (MR) dye under visible light irradiation at 100 minutes intervals time. The SHF/C5 catalyst showed a significantly higher removal (91%) of dye compared to pure SHF (63%) for the same exposure time of irradiation. Recyclability tests of the SHF/C5 photocatalyst showed only a minor loss in its catalytic activity (only 2%) even after four consecutive cycles. The outcomes revealed that co-doping significantly improved the catalytic properties of SrFe12O19, signifying its application in harvesting solar light for the photocatalytic removal of organic dyes from industrial wastewater.