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<p>In this work, the undoped, Mn-doped, Ni-doped, and (Mn, Ni) co-doped CdS nanoparticles (NPs) were prepared via hydrothermal method utilizing simple materials. The impact of doping on the optical behavior, surface morphology, and crystal structure was examined utilizing a diverse characterization technique. The X-ray diffraction verified the wurtzite CdS phase, with Mn<sup>2</sup>⁺ and Ni<sup>2</sup>⁺ ions successfully substituting Cd<sup>2</sup>⁺ ions without altering the crystal structure. Co-doping increased the crystallite size from 18.95 to 23.05 nm, as estimated using the Scherrer equation. The results from FESEM and EDS indicate the dual metal incorporation into the CdS lattice. According to the optical analysis, the doping caused the band gap to reduce from 2.4 to 1.7 eV. The antibacterial efficacy of the synthesized nanoparticles was evaluated using the agar well diffusion method against Gram-positive <i>Staphylococcus aureus</i> and Gram-negative <i>Pseudomonas aeruginosa</i>. The co-doped CdS samples with 3% Mn:3% Ni and 3% Mn:2% Ni at a concentration of 3 mg/ml exhibited enhanced antibacterial activity, with inhibition zones of 20 mm against <i>P. aeruginosa</i> and 14 mm against <i>S. aureus</i>, respectively.</p>

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Augmentation of Antibacterial Efficacy of Synthesized Cadmium Sulfide Flower-Shaped Multipod Nanostructures Through Dual Doping with Manganese and Nickel

  • 期刊论文

  • 发表日期：

    2025年8月26日

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  • Nwar A. Yousif,
  • Thamir H. Ali,
  • Selma M. H. AL-Jawad,
  • Hawraa H. Abbas

摘要

In this work, the undoped, Mn-doped, Ni-doped, and (Mn, Ni) co-doped CdS nanoparticles (NPs) were prepared via hydrothermal method utilizing simple materials. The impact of doping on the optical behavior, surface morphology, and crystal structure was examined utilizing a diverse characterization technique. The X-ray diffraction verified the wurtzite CdS phase, with Mn2⁺ and Ni2⁺ ions successfully substituting Cd2⁺ ions without altering the crystal structure. Co-doping increased the crystallite size from 18.95 to 23.05 nm, as estimated using the Scherrer equation. The results from FESEM and EDS indicate the dual metal incorporation into the CdS lattice. According to the optical analysis, the doping caused the band gap to reduce from 2.4 to 1.7 eV. The antibacterial efficacy of the synthesized nanoparticles was evaluated using the agar well diffusion method against Gram-positive Staphylococcus aureus and Gram-negative Pseudomonas aeruginosa. The co-doped CdS samples with 3% Mn:3% Ni and 3% Mn:2% Ni at a concentration of 3 mg/ml exhibited enhanced antibacterial activity, with inhibition zones of 20 mm against P. aeruginosa and 14 mm against S. aureus, respectively.