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<p>Global challenges in water pollution and sustainable energy demand innovative solutions. This study presents a novel nickel-decorated silver ferrite (Ni-AGF) nanocomposite synthesized via a sol-gel method. The composite's structural, morphological, and compositional features were analyzed using techniques including TEM, SEM, BET, FTIR, and UV-Vis spectroscopy. Structural and morphological analyses revealed uniform dispersion of Ni nanoparticles (~&#xa0;4.3&#xa0;nm) on AgFeO<sub>2</sub> (~&#xa0;23.2&#xa0;nm) with increased surface area (110.7&#xa0;m<sup>2</sup>/g) at 6&#xa0;wt% Ni loading. SEM and EDX confirmed the presence of Ni, Ag, Fe, and O elements, and TEM images suggested uniform dispersion of Ni nanoparticles on the AgFeO<sub>2</sub> surface. While, UV-VIS spectroscopy allowed calculation of the band gap energies, showing that the nickel nanoparticles influence the composite's optical properties. Photocatalytic experiments demonstrated that the 6&#xa0;wt% Ni-AGF achieved a 97% degradation of Rhodamine B within 90 minutes and exhibited the highest first-order rate constant (0.0178 min<sup>−1</sup>). Under visible light, this composition also yielded the maximum hydrogen evolution rate of 0.475&#xa0;mmol&#xa0;h<sup>−1</sup>&#xa0;g<sup>−1</sup> using ethylene glycol as a sacrificial agent. The catalyst retained 88.1% of its activity after five cycles, enabled by its magnetic recoverability. These findings highlight the potential of Ni-AGF as a cost-effective, dual-functional material for wastewater treatment and sustainable energy applications.</p>

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Nickel-Decorated Silver Ferrite Nanocomposites for Enhanced Photodegradation of Rhodamine B and Efficient Hydrogen Production

  • 期刊论文

  • 发表日期：

    2025年6月19日

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  • Gamal H. Sewify,
  • Mohamed Mokhtar M. Mostafa,
  • Mostafa S. Gouda,
  • Reda. S. Salama,
  • A. A. El-Hallag

摘要

Global challenges in water pollution and sustainable energy demand innovative solutions. This study presents a novel nickel-decorated silver ferrite (Ni-AGF) nanocomposite synthesized via a sol-gel method. The composite's structural, morphological, and compositional features were analyzed using techniques including TEM, SEM, BET, FTIR, and UV-Vis spectroscopy. Structural and morphological analyses revealed uniform dispersion of Ni nanoparticles (~ 4.3 nm) on AgFeO2 (~ 23.2 nm) with increased surface area (110.7 m2/g) at 6 wt% Ni loading. SEM and EDX confirmed the presence of Ni, Ag, Fe, and O elements, and TEM images suggested uniform dispersion of Ni nanoparticles on the AgFeO2 surface. While, UV-VIS spectroscopy allowed calculation of the band gap energies, showing that the nickel nanoparticles influence the composite's optical properties. Photocatalytic experiments demonstrated that the 6 wt% Ni-AGF achieved a 97% degradation of Rhodamine B within 90 minutes and exhibited the highest first-order rate constant (0.0178 min−1). Under visible light, this composition also yielded the maximum hydrogen evolution rate of 0.475 mmol h−1 g−1 using ethylene glycol as a sacrificial agent. The catalyst retained 88.1% of its activity after five cycles, enabled by its magnetic recoverability. These findings highlight the potential of Ni-AGF as a cost-effective, dual-functional material for wastewater treatment and sustainable energy applications.