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<p>Cobalt-doped strontium ferrite nanoparticles, Co<sub>x</sub>Sr<sub>1-x</sub>Fe<sub>2</sub>O<sub>4</sub> (<i>x</i> = 0, 0.2, 0.4, 0.6) were synthesized via, microwave-assisted combustion method using <i>allium cepa</i> extract as fuel. The prepared nanoparticles were characterized using, PXRD, FTIR, SEM, EDX, HRTEM, XPS, UV–Visible and photoluminescence spectroscopy. PXRD analysis indicated that prepared nanoparticles are spinel cubic in nature and have an average crystalline size between 9 and 31&#xa0;nm. FTIR investigations confirm stretching vibrations of metal–oxygen bonds at tetrahedral and octahedral sites, According to SEM and HRTEM analyses, the prepared NPs exhibit a sponge-like agglomeration surface morphology with a structure resembling nanoflakes. The elemental composition of CDSF NPs is confirmed using an EDX spectrum. Oxidation, transition states, and elemental purity are confirmed by XPS spectroscopy. According to UV–visible spectral studies, blue shift happens after Co doping, but red shift is shown as doping increases, whereas in photoluminescence studies, the intensity of luminescence rises as cobalt doping increases. Methylene blue dye degradation in presence of photocatalyst CDSF NPs reveals that 95.67% of dye degradation was observed at time interval of 0–120&#xa0;min. According to electrochemical investigations, prepared NPs have good responsive behaviour in terms of electrode resistance, Ohmic resistance, and charge transfer.</p>

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Facile microwave-assisted green-synthesized cobalt-doped strontium ferrite nanoparticles for the photodegradation of dyes and electrochemical applications

  • 期刊论文

  • 发表日期：

    2025年9月13日

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  • G. Vishnu,
  • H. S. Bhojya Naik,
  • H. A. Anil Kumara,
  • N. Adarshgowda

摘要

Cobalt-doped strontium ferrite nanoparticles, CoxSr1-xFe2O4 (x = 0, 0.2, 0.4, 0.6) were synthesized via, microwave-assisted combustion method using allium cepa extract as fuel. The prepared nanoparticles were characterized using, PXRD, FTIR, SEM, EDX, HRTEM, XPS, UV–Visible and photoluminescence spectroscopy. PXRD analysis indicated that prepared nanoparticles are spinel cubic in nature and have an average crystalline size between 9 and 31 nm. FTIR investigations confirm stretching vibrations of metal–oxygen bonds at tetrahedral and octahedral sites, According to SEM and HRTEM analyses, the prepared NPs exhibit a sponge-like agglomeration surface morphology with a structure resembling nanoflakes. The elemental composition of CDSF NPs is confirmed using an EDX spectrum. Oxidation, transition states, and elemental purity are confirmed by XPS spectroscopy. According to UV–visible spectral studies, blue shift happens after Co doping, but red shift is shown as doping increases, whereas in photoluminescence studies, the intensity of luminescence rises as cobalt doping increases. Methylene blue dye degradation in presence of photocatalyst CDSF NPs reveals that 95.67% of dye degradation was observed at time interval of 0–120 min. According to electrochemical investigations, prepared NPs have good responsive behaviour in terms of electrode resistance, Ohmic resistance, and charge transfer.