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<p>The increasing contamination of water bodies by industrial dyes necessitates the development of efficient and sustainable remediation technologies. This study investigates the structural, optical, photocatalytic, and radiation shielding properties of Mg<sub>0.8</sub>Zn<sub>0.2</sub>Cr<sub>x</sub>Fe<sub>2-x</sub>O<sub>4</sub> nanoferrites (x = 0.00–0.025), synthesized via the citrate combustion technique. The bandgap energy of the synthesized nanoferrites was tuned through Cr<sup>3</sup>⁺ substitution, significantly enhancing their photocatalytic performance in methylene blue dye degradation under visible light irradiation. The optimized composition, Mg<sub>0.8</sub>Zn<sub>0.2</sub>Cr<sub>0.025</sub>Fe<sub>1.975</sub>O<sub>4</sub>, exhibited a remarkable degradation efficiency of 97.15% over 60&#xa0;min, attributed to enhanced charge separation and reduced recombination losses. Additionally, radiation shielding parameters such as the mass attenuation coefficient, half value layer, and effective atomic number (Z<sub>eff</sub>) were evaluated across a photon energy range of 0.015–15&#xa0;MeV. The results demonstrate that Cr-substituted Mg–Zn nanoferrites possess superior shielding efficiency compared to conventional materials, making them promising candidates for multifunctional water purification and radiation protection applications. The recyclability and stability of the synthesized photocatalyst further highlight its potential for practical implementation in environmental remediation.</p>

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Structural, optical, photocatalytic, and radiation shielding properties of Mg0.8Zn0.2CrxFe2-xO4 nanoferrites

  • 期刊论文

  • 发表日期：

    2025年9月29日

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  • Hala Siddiq,
  • Fatimah M. Alsaiari,
  • Abeer A. Alghamdi,
  • Awatif Alshamari,
  • Mohammad A. Z. Qutub,
  • M. S. Sadeq,
  • E. Abdel‑Fattah,
  • M. A. Abdo

摘要

The increasing contamination of water bodies by industrial dyes necessitates the development of efficient and sustainable remediation technologies. This study investigates the structural, optical, photocatalytic, and radiation shielding properties of Mg0.8Zn0.2CrxFe2-xO4 nanoferrites (x = 0.00–0.025), synthesized via the citrate combustion technique. The bandgap energy of the synthesized nanoferrites was tuned through Cr3⁺ substitution, significantly enhancing their photocatalytic performance in methylene blue dye degradation under visible light irradiation. The optimized composition, Mg0.8Zn0.2Cr0.025Fe1.975O4, exhibited a remarkable degradation efficiency of 97.15% over 60 min, attributed to enhanced charge separation and reduced recombination losses. Additionally, radiation shielding parameters such as the mass attenuation coefficient, half value layer, and effective atomic number (Zeff) were evaluated across a photon energy range of 0.015–15 MeV. The results demonstrate that Cr-substituted Mg–Zn nanoferrites possess superior shielding efficiency compared to conventional materials, making them promising candidates for multifunctional water purification and radiation protection applications. The recyclability and stability of the synthesized photocatalyst further highlight its potential for practical implementation in environmental remediation.