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<p>This work proposes a unique and effective strategy for synthesis of platinum-doped zinc oxide nanoparticles (Pt-doped ZnO NPs) employing polyvinylpyrrolidone (PVP) and sodium borohydride (NaBH₄) as stabilizing and reducing agents. The primary objective of this study was to enhance the photocatalytic and antibacterial performance of ZnO nanoparticles by incorporating Pt NPs as a dopant. Structural evaluation demonstrated good crystallinity and purity in the produced nanomaterials, while optical examination confirmed a lowering of the energy bandgap and better charge carrier separation due to Pt doping. Surface morphology investigation using FESEM revealed the production of evenly dispersed spherical NPs clusters. The photocatalytic performance was evaluated by monitoring the breakdown of methylene blue (MB) dye under sunshine irradiation for 180&#xa0;min. Pt-doped ZnO had a much higher photodegradation efficiency of 96% compared to undoped ZnO’s 59.5%. Kinetic modeling demonstrated pseudo-first-order behavior, with a rate constant of 0.02029&#xa0;min<sup>−1</sup> for Pt-ZnO and 0.00500&#xa0;min<sup>−1</sup> for ZnO. At various doses, antibacterial activity was measured against <i>Escherichia coli</i> and <i>Staphylococcus aureus</i>. Both materials demonstrated inhibitory effects: however, Pt-doped ZnO was significantly more effective, particularly agains<i>t Staphylococcus aureus.</i> The novel synthesis approach and dual-functionality performance emphasize the promise of Pt-ZnO NPs in environmental and biological applications.</p>

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Synthesis and Evaluation of PVP-Stabilized Platinum-Doped ZnO Nanoparticles: A Dual Approach for Photocatalytic and Antibacterial Applications

  • 期刊论文

  • 发表日期：

    2025年5月19日

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  • Ali M. Ahmed,
  • Muntadher I. Rahmah

摘要

This work proposes a unique and effective strategy for synthesis of platinum-doped zinc oxide nanoparticles (Pt-doped ZnO NPs) employing polyvinylpyrrolidone (PVP) and sodium borohydride (NaBH₄) as stabilizing and reducing agents. The primary objective of this study was to enhance the photocatalytic and antibacterial performance of ZnO nanoparticles by incorporating Pt NPs as a dopant. Structural evaluation demonstrated good crystallinity and purity in the produced nanomaterials, while optical examination confirmed a lowering of the energy bandgap and better charge carrier separation due to Pt doping. Surface morphology investigation using FESEM revealed the production of evenly dispersed spherical NPs clusters. The photocatalytic performance was evaluated by monitoring the breakdown of methylene blue (MB) dye under sunshine irradiation for 180 min. Pt-doped ZnO had a much higher photodegradation efficiency of 96% compared to undoped ZnO’s 59.5%. Kinetic modeling demonstrated pseudo-first-order behavior, with a rate constant of 0.02029 min−1 for Pt-ZnO and 0.00500 min−1 for ZnO. At various doses, antibacterial activity was measured against Escherichia coli and Staphylococcus aureus. Both materials demonstrated inhibitory effects: however, Pt-doped ZnO was significantly more effective, particularly against Staphylococcus aureus. The novel synthesis approach and dual-functionality performance emphasize the promise of Pt-ZnO NPs in environmental and biological applications.