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<p>Here, we present the preparation of (NiFe<sub>2−x</sub>Cr<sub>x</sub>O₄), with x = 0.0, 0.1, 0.2, 0.3 and 0.4 nanoparticles using a green synthesis method, employing the extract of Aegle marmelos (Bel leaves<i>)</i> as biogenic green fuel. The single-phase production having an FCC-type simple cubic spinel structure was verified by XRD analysis. The prepared nanoparticles exhibit crystallite sizes of 14 to 8&#xa0;nm. The lattice constant (a) calculated from XRD data decreased from 8.346 Å to 8.307 Å. The formation of spherical grains with some agglomeration was observed through FE-SEM analysis. The surface area determined by BET analysis increases with Cr<sup>3+</sup> content and ranges from 33.62 m<sup>2</sup>/g to 59.32 m<sup>2</sup>/g. The band gap energy calculated using the Tauc plot was in the range 1.57&#xa0;eV-1.74&#xa0;eV. Saturation magnetization decreases with Cr<sup>3+</sup> content. The low coercivity values suggest the superparamagnetic nature of the prepared nanoparticles. No systematic dependence of antibacterial properties of the synthesized nanoparticles was found against Gram-positive (S. Aureus and B. Subtilis) and Gram-negative (E. coli, K. Pneumonia) bacteria for varying Cr<sup>3+</sup> content. However, the sample with x = 0.2 exhibits enhanced antibacterial activity compared to the other compositions.</p>

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Aegle Marmelos Mediated Green Synthesis of Chromium-doped Nickel Ferrite Nanoparticles for Antibacterial Activity

  • 期刊论文

  • 发表日期：

    2026年5月28日

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  • Kajal A. Gurav,
  • Sudarshan Gawali,
  • Subhash M Wani,
  • A. P. Keche,
  • K. M. Jadhav

摘要

Here, we present the preparation of (NiFe2−xCrxO₄), with x = 0.0, 0.1, 0.2, 0.3 and 0.4 nanoparticles using a green synthesis method, employing the extract of Aegle marmelos (Bel leaves) as biogenic green fuel. The single-phase production having an FCC-type simple cubic spinel structure was verified by XRD analysis. The prepared nanoparticles exhibit crystallite sizes of 14 to 8 nm. The lattice constant (a) calculated from XRD data decreased from 8.346 Å to 8.307 Å. The formation of spherical grains with some agglomeration was observed through FE-SEM analysis. The surface area determined by BET analysis increases with Cr3+ content and ranges from 33.62 m2/g to 59.32 m2/g. The band gap energy calculated using the Tauc plot was in the range 1.57 eV-1.74 eV. Saturation magnetization decreases with Cr3+ content. The low coercivity values suggest the superparamagnetic nature of the prepared nanoparticles. No systematic dependence of antibacterial properties of the synthesized nanoparticles was found against Gram-positive (S. Aureus and B. Subtilis) and Gram-negative (E. coli, K. Pneumonia) bacteria for varying Cr3+ content. However, the sample with x = 0.2 exhibits enhanced antibacterial activity compared to the other compositions.