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<p>This study reports the sustainable green synthesis of zinc oxide nanoparticles (ZnO NPs) using <i>Sesamum indicum</i> leaf mucilage as a natural reducing and stabilizing agent. Characterization techniques, including UV–Vis spectroscopy, FTIR, XRD, and TEM, confirmed the successful formation of semi-crystalline, spherical ZnO NPs, with effective biopolymer capping. The ZnO NPs exhibited concentration-dependent antibacterial activity against levofloxacin-resistant <i>Staphylococcus aureus</i> isolates, demonstrating significant bactericidal effects at lower concentrations. Furthermore, the nanoparticles displayed robust antibiofilm properties, significantly reducing biofilm formation and disrupting mature biofilms at sub-MIC concentrations, as confirmed by crystal violet, XTT metabolic activity, and ATP-based viability assays. The photocatalytic activity of ZnO NPs was assessed using methylene blue (MB) and Congo red (CR) dyes, showing efficient degradation with 90.41% MB and 92.54% CR removal after 100&#xa0;min, consistent with pseudo-first-order kinetics. These results highlight the potential of ZnO NPs as effective photocatalysts for environmental remediation. Additionally, the treated wastewater facilitated mung bean seed germination, demonstrating the nanoparticles' potential applications in water conservation for agriculture. Overall, these findings underscore the multifunctional potential of <i>S. indicum</i> leaf mucilage-mediated ZnO NPs, making them promising candidates for large-scale applications in antimicrobial coatings, wastewater treatment, environmental remediation, and agricultural water management.</p>

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Sesamum Indicum Leaf Mucilage-Derived Biogenic ZnO Nanoparticles: Synergistic Antimicrobial Activity and Photocatalytic Degradation of Organic Pollutants in Wastewater

  • 期刊论文

  • 发表日期：

    2026年7月1日

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  • Vijayapoopathi Singaravel,
  • Yamini Murali,
  • Priyadharshan Thangavel Sekaran,
  • Michael Samuel,
  • Jayaraman Narenkumar,
  • Praburaman Loganathan,
  • Pachaiyappan Murugan,
  • Meivelu Moovendhan

摘要

This study reports the sustainable green synthesis of zinc oxide nanoparticles (ZnO NPs) using Sesamum indicum leaf mucilage as a natural reducing and stabilizing agent. Characterization techniques, including UV–Vis spectroscopy, FTIR, XRD, and TEM, confirmed the successful formation of semi-crystalline, spherical ZnO NPs, with effective biopolymer capping. The ZnO NPs exhibited concentration-dependent antibacterial activity against levofloxacin-resistant Staphylococcus aureus isolates, demonstrating significant bactericidal effects at lower concentrations. Furthermore, the nanoparticles displayed robust antibiofilm properties, significantly reducing biofilm formation and disrupting mature biofilms at sub-MIC concentrations, as confirmed by crystal violet, XTT metabolic activity, and ATP-based viability assays. The photocatalytic activity of ZnO NPs was assessed using methylene blue (MB) and Congo red (CR) dyes, showing efficient degradation with 90.41% MB and 92.54% CR removal after 100 min, consistent with pseudo-first-order kinetics. These results highlight the potential of ZnO NPs as effective photocatalysts for environmental remediation. Additionally, the treated wastewater facilitated mung bean seed germination, demonstrating the nanoparticles' potential applications in water conservation for agriculture. Overall, these findings underscore the multifunctional potential of S. indicum leaf mucilage-mediated ZnO NPs, making them promising candidates for large-scale applications in antimicrobial coatings, wastewater treatment, environmental remediation, and agricultural water management.