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<p>In the current study, nickel ferrite (NiFe<sub>2</sub>O<sub>4</sub>) nanoparticles (NPs) were successfully synthesized via solution combustion method using <i>Guizotia abyssinica</i> (niger) seeds as a novel bio-fuel. This approach provides an eco-friendly and renewable method for NPs synthesis. The synthesis process involved the rapid exothermic reaction of a mixture containing nickel and iron precursors along with biofuel, resulting in the formation of NiFe<sub>2</sub>O<sub>4</sub> NPs. The synthesized NPs were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), ultraviolet–visible spectroscopy (UV–Vis), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) spectroscopy. The single-phase cubic spinel structured NiFe<sub>2</sub>O<sub>4</sub> was confirmed by XRD studies. TEM images revealed some degree of aggregation with less defined rod-like morphology. Coumarin studies ensure the effective generation of hydroxyl radicals (•OH) on the photocatalyst surface, facilitating the superior activity towards the degradation of organic dyes. Besides, NiFe<sub>2</sub>O<sub>4</sub> NPs shows good reusability. Electrochemical behavior of the NiFe<sub>2</sub>O<sub>4</sub> NPs was examined using electrochemical impedance spectroscopy (EIS), revealing the optimization of the materials. The research demonstrated high photocatalytic degradation efficiency of NiFe<sub>2</sub>O<sub>4</sub> NPs with Rose Bengal (RB) dye, achieving 91% of degradation under visible light irradiation.</p> Graphical Abstract <p></p>

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Swift biosynthesis of NiFe2O4 nanoparticles from Guizotia abyssinica seeds for superior photocatalytic dye degradation

  • 期刊论文

  • 发表日期：

    2025年8月28日

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  • Gagana G.R,
  • Pavan,
  • Udayabhanu,
  • K. N. Nandeesh,
  • H. N. Shwetha,
  • Mohd. Shkir,
  • G. Nagaraju

摘要

In the current study, nickel ferrite (NiFe2O4) nanoparticles (NPs) were successfully synthesized via solution combustion method using Guizotia abyssinica (niger) seeds as a novel bio-fuel. This approach provides an eco-friendly and renewable method for NPs synthesis. The synthesis process involved the rapid exothermic reaction of a mixture containing nickel and iron precursors along with biofuel, resulting in the formation of NiFe2O4 NPs. The synthesized NPs were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), ultraviolet–visible spectroscopy (UV–Vis), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) spectroscopy. The single-phase cubic spinel structured NiFe2O4 was confirmed by XRD studies. TEM images revealed some degree of aggregation with less defined rod-like morphology. Coumarin studies ensure the effective generation of hydroxyl radicals (•OH) on the photocatalyst surface, facilitating the superior activity towards the degradation of organic dyes. Besides, NiFe2O4 NPs shows good reusability. Electrochemical behavior of the NiFe2O4 NPs was examined using electrochemical impedance spectroscopy (EIS), revealing the optimization of the materials. The research demonstrated high photocatalytic degradation efficiency of NiFe2O4 NPs with Rose Bengal (RB) dye, achieving 91% of degradation under visible light irradiation.

Graphical Abstract