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<p><i>Laggera alata</i> has a long history of medicinal use and recent studies have explored its potential in the synthesis of magnesium-doped zinc oxide (Mg-doped ZnO) nanoparticles for biomedical and environmental applications. The successful synthesis of these nanoparticles was confirmed using UV–Vis spectroscopy, which revealed a distinct absorption peak at 280&#xa0;nm. Fourier-transform infrared (FTIR) analysis identified 12 functional groups, while X-ray diffraction (XRD) confirmed the crystalline structure of the nanoparticles. Scanning electron microscopy (SEM) revealed a spherical morphology and energy dispersive X-ray analysis (EDAX) verified the presence of magnesium, zinc and oxygen. The Mg-doped ZnO nanoparticles demonstrated significant antibacterial activity, with the largest inhibition zone observed against <i>Bacillus subtilis</i> (10&#xa0;mm). Biofilm inhibition assays further supported their strong antibacterial effects. In vitro antioxidant assays, including DPPH and ABTS, showed scavenging rates of 61.46 and 60.74%, respectively. Antioxidant enzyme activities, such as peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT), were also evaluated to understand the biochemical mechanisms behind the enhanced pest resistance. These bio-nanoparticles offer a safe, sustainable and environmentally friendly alternative to chemical pesticides, making them promising candidates for Integrated Pest Management (IPM) strategies, particularly in sustainable cucurbit farming. Their environmental effectiveness was further demonstrated by an 86% degradation rate of methylene blue dye, indicating their potential in environmental cleanup. Overall, these findings highlight Mg-doped ZnO nanoparticles as valuable agents for both biomedical and environmental applications.</p>

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Synthesis, Characterization and Biomedical Environmental Applications of Magnesium-Doped Zinc Oxide Nanoparticles Using Laggera alata Extract

  • 期刊论文

  • 发表日期：

    2025年7月10日

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  • Manickam Gomathi,
  • Dharmalingam Kirubakaran,
  • Raja Malarkodi

摘要

Laggera alata has a long history of medicinal use and recent studies have explored its potential in the synthesis of magnesium-doped zinc oxide (Mg-doped ZnO) nanoparticles for biomedical and environmental applications. The successful synthesis of these nanoparticles was confirmed using UV–Vis spectroscopy, which revealed a distinct absorption peak at 280 nm. Fourier-transform infrared (FTIR) analysis identified 12 functional groups, while X-ray diffraction (XRD) confirmed the crystalline structure of the nanoparticles. Scanning electron microscopy (SEM) revealed a spherical morphology and energy dispersive X-ray analysis (EDAX) verified the presence of magnesium, zinc and oxygen. The Mg-doped ZnO nanoparticles demonstrated significant antibacterial activity, with the largest inhibition zone observed against Bacillus subtilis (10 mm). Biofilm inhibition assays further supported their strong antibacterial effects. In vitro antioxidant assays, including DPPH and ABTS, showed scavenging rates of 61.46 and 60.74%, respectively. Antioxidant enzyme activities, such as peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT), were also evaluated to understand the biochemical mechanisms behind the enhanced pest resistance. These bio-nanoparticles offer a safe, sustainable and environmentally friendly alternative to chemical pesticides, making them promising candidates for Integrated Pest Management (IPM) strategies, particularly in sustainable cucurbit farming. Their environmental effectiveness was further demonstrated by an 86% degradation rate of methylene blue dye, indicating their potential in environmental cleanup. Overall, these findings highlight Mg-doped ZnO nanoparticles as valuable agents for both biomedical and environmental applications.