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<p>This study highlights the eco-friendly preparation of nanostructured Zinc oxide (ZnO NPs) via <i>Acmella oleracea (L.)</i> leaf extract, renowned for its rich bioactive properties. Green synthesis was chosen for its simplicity, eco-friendly and avoidance of toxic chemicals. The obtained ZnO NPs were extensively analyzed through different instrumental methods including optical, structural, morphological, compositional and particle size studies such as UV-Visible spectroscopy, Fourier transform infra-red spectroscopy (FTIR), Scanning electron microscopy (SEM), Energy dispersive X-ray analysis (EDAX) and dynamic light scattering (DLS). FTIR investigation demonstrated the fingerprint functional groups of plant extract that aid in nanoparticle synthesis and stabilization while EDAX confirmed a Zn and O composition of 22.54% and 77.46% respectively. UV-Vis spectroscopy showed an optical band gap of 2.24&#xa0;eV indicating potential for optoelectronic applications. According to DLS characterization, the nanoparticles exhibited an average size was 119&#xa0;nm with a PDI of 0.436 suggesting uniformity in particles dispersion. Electrochemical polarization and AC impedance studies highlighted excellent corrosion inhibition properties, supported by the optical and electrical characteristics of the nanoparticles. The study reveals that green-synthesized ZnO NPs hold great promise as corrosion inhibitors and as environmentally benign protective coatings.</p>

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Superior Corrosion Mitigation of Mild Steel via Green Synthesized ZnO Nanoparticles: The Acmella oleracea Advantage

  • 期刊论文

  • 发表日期：

    2026年3月6日

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  • Shifana Meeran,
  • A. Samsath Begum,
  • M. Varusai Mohamed,
  • H. Mohamed Kasim Sheit,
  • K. S. Mohan,
  • S. Berbeth Mary

摘要

This study highlights the eco-friendly preparation of nanostructured Zinc oxide (ZnO NPs) via Acmella oleracea (L.) leaf extract, renowned for its rich bioactive properties. Green synthesis was chosen for its simplicity, eco-friendly and avoidance of toxic chemicals. The obtained ZnO NPs were extensively analyzed through different instrumental methods including optical, structural, morphological, compositional and particle size studies such as UV-Visible spectroscopy, Fourier transform infra-red spectroscopy (FTIR), Scanning electron microscopy (SEM), Energy dispersive X-ray analysis (EDAX) and dynamic light scattering (DLS). FTIR investigation demonstrated the fingerprint functional groups of plant extract that aid in nanoparticle synthesis and stabilization while EDAX confirmed a Zn and O composition of 22.54% and 77.46% respectively. UV-Vis spectroscopy showed an optical band gap of 2.24 eV indicating potential for optoelectronic applications. According to DLS characterization, the nanoparticles exhibited an average size was 119 nm with a PDI of 0.436 suggesting uniformity in particles dispersion. Electrochemical polarization and AC impedance studies highlighted excellent corrosion inhibition properties, supported by the optical and electrical characteristics of the nanoparticles. The study reveals that green-synthesized ZnO NPs hold great promise as corrosion inhibitors and as environmentally benign protective coatings.