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<p>Green synthesis approach has emerging in recent years because of its low cost, less toxic, and environmentally friendly nature. The present study is focused on the preparation of Cr<sup>3+</sup> doped nickel ferrite nanoparticles by sol-gel auto-combustion route by employing a green synthesis approach utilizing an extract of ginger. X-ray diffraction studies prove the single-phase nature of cubic spinel structure. Crystallite size obtained from Debye Scherrer equation varies between 11 and 16&#xa0;nm establishing the nanocrystalline nature. The structural parameters like lattice constant, unit cell volume, etc. increases with Cr<sup>3+</sup> doping. The characteristic absorption bands are seen in FTIR spectra at around 400&#xa0;cm<sup>− 1</sup> and 600&#xa0;cm<sup>− 1</sup>. FE-SEM images revealed the spherical structure with grain size of the order of 22 to 27&#xa0;nm. Raman spectra of spinel ferrite show five Raman active modes. The magnetization measurements show saturation magnetization of the order of 32.23 emu/gm, which goes on decreasing with Cr<sup>3+</sup> doping. In the photocatalytic application, the dye degradation efficiency of the order of 90% was observed for methylene blue on adding 0.3 gm of nickel ferrite nano-catalyst. The degradation efficiency decreases. Thus, the prepared Cr<sup>3+</sup> doped nickel ferrite magnetic nano-catalyst shows high catalytic activity under visible light.</p>

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Green synthesis of Cr3+ doped nickel ferrite nanoparticles and their photocatalytic applications

  • 期刊论文

  • 发表日期：

    2025年3月5日

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  • Yogesh P. Ubale,
  • Pratik S. Patil,
  • Sudarshan S. Gawali,
  • Sagar V. Rathod,
  • K. M. Jadhav

摘要

Green synthesis approach has emerging in recent years because of its low cost, less toxic, and environmentally friendly nature. The present study is focused on the preparation of Cr3+ doped nickel ferrite nanoparticles by sol-gel auto-combustion route by employing a green synthesis approach utilizing an extract of ginger. X-ray diffraction studies prove the single-phase nature of cubic spinel structure. Crystallite size obtained from Debye Scherrer equation varies between 11 and 16 nm establishing the nanocrystalline nature. The structural parameters like lattice constant, unit cell volume, etc. increases with Cr3+ doping. The characteristic absorption bands are seen in FTIR spectra at around 400 cm− 1 and 600 cm− 1. FE-SEM images revealed the spherical structure with grain size of the order of 22 to 27 nm. Raman spectra of spinel ferrite show five Raman active modes. The magnetization measurements show saturation magnetization of the order of 32.23 emu/gm, which goes on decreasing with Cr3+ doping. In the photocatalytic application, the dye degradation efficiency of the order of 90% was observed for methylene blue on adding 0.3 gm of nickel ferrite nano-catalyst. The degradation efficiency decreases. Thus, the prepared Cr3+ doped nickel ferrite magnetic nano-catalyst shows high catalytic activity under visible light.