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<p>In this research, we have focused to examine en detail the microstructural, magneto-optical and photocatalytic properties of the spinel chromite Ni<sub>0.5</sub>Cd<sub>0.5</sub>Cr<sub>2</sub>O<sub>4</sub>. SEM analysis revealed an average crystallite size of approximately 73 µm. Magnetic characterization, based on hysteresis loop measurements, enabled the determination of key parameters including the saturation magnetization (M<sub>S</sub>), coercivity (Hc), anisotropy constant (K), and squareness ratio (SQ). The band gap energy (Eg) was estimated to be 2.52 eV using multiple methods, including the Tauc plot and the derivative method. The superposition of the absorbance and reflectance spectra reveals an optical singularity around 895 nm. Cauchy dispersion parameters were derived from the variation of the refractive index with wavelength, and the dispersion energy was evaluated using the Wemple–DiDomenico relation. Additional optical parameters—such as penetration depth, extinction coefficient, electrical conductivity, and plasma frequency—were analyzed as functions of wavelength. Finally, the photocatalytic activity of Ni<sub>0.5</sub>Cd<sub>0.5</sub>Cr<sub>2</sub>O<sub>4</sub> was assessed through the degradation of methylene blue, confirming its potential for environmental remediation. Overall, this comprehensive study provides valuable insights into the multifaceted physicochemical behavior of Ni<sub>0.5</sub>Cd<sub>0.5</sub>Cr<sub>2</sub>O<sub>4</sub> and underscores its applicability in functional and environmental applications.</p> Graphical Abstract <p></p>

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Optimizing magnetic, optical, and efficient photocatalytic properties of chromite material for dye degradation

  • 期刊论文

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  • 发表日期：

    2026年4月30日

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  • Kais Omri,
  • Abdelbaki Guedri,
  • Wided Nouira,
  • M. Nasri,
  • J. Khelifi,
  • E. K. Hlil,
  • Rached Ben Younes

摘要

In this research, we have focused to examine en detail the microstructural, magneto-optical and photocatalytic properties of the spinel chromite Ni0.5Cd0.5Cr2O4. SEM analysis revealed an average crystallite size of approximately 73 µm. Magnetic characterization, based on hysteresis loop measurements, enabled the determination of key parameters including the saturation magnetization (MS), coercivity (Hc), anisotropy constant (K), and squareness ratio (SQ). The band gap energy (Eg) was estimated to be 2.52 eV using multiple methods, including the Tauc plot and the derivative method. The superposition of the absorbance and reflectance spectra reveals an optical singularity around 895 nm. Cauchy dispersion parameters were derived from the variation of the refractive index with wavelength, and the dispersion energy was evaluated using the Wemple–DiDomenico relation. Additional optical parameters—such as penetration depth, extinction coefficient, electrical conductivity, and plasma frequency—were analyzed as functions of wavelength. Finally, the photocatalytic activity of Ni0.5Cd0.5Cr2O4 was assessed through the degradation of methylene blue, confirming its potential for environmental remediation. Overall, this comprehensive study provides valuable insights into the multifaceted physicochemical behavior of Ni0.5Cd0.5Cr2O4 and underscores its applicability in functional and environmental applications.

Graphical Abstract