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<p>Zinc oxide (ZnO) nanoparticles are widely studied due to their optical, antimicrobial, low toxicity and catalytic properties. Recently, plant-extracts-assisted synthesis has gained attention, and natural compounds including eucalyptus oil offer complementary functionalities. In this work, ZnO nanoparticles were synthesized via coprecipitation assisted by eucalyptus essential oil, which acted as stabilizing agent. The obtained materials showed a UV–vis absorption band near 360&#xa0;nm and band gaps of 3.22 and 3.21&#xa0;eV, confirming nanoparticle formation. FTIR analysis revealed functional groups associated with eucalyptus oil. XRD demonstrated a hexagonal wurtzite crystalline structure, with crystallite sizes of 16.17&#xa0;nm for ZnO_400 and 11.77&#xa0;nm for EZnO_400. DLS measurements showed hydrodynamic sizes of 945.6&#xa0;nm and 240.4&#xa0;nm for ZnO_400 and EZnO_400, respectively, indicating improved stabilization in the presence of eucalyptus oil. These findings highlight the effectiveness of eucalyptus essential oil in producing green ZnO nanoparticles with enhanced physicochemical properties and potential larvicidal applications.</p> Graphical abstract <p></p>

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Synthesis and characterization of zinc oxide nanoparticles using eucalyptus essential oil

  • 期刊论文

  • 发表日期：

    2026年3月5日

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  • Perla Paola Preciado-Medina,
  • Armin Hernández-Gordillo,
  • Celso Velásquez-Ordóñez,
  • Víctor Rentería-Tapia,
  • María Luisa Ojeda-Martínez

摘要

Zinc oxide (ZnO) nanoparticles are widely studied due to their optical, antimicrobial, low toxicity and catalytic properties. Recently, plant-extracts-assisted synthesis has gained attention, and natural compounds including eucalyptus oil offer complementary functionalities. In this work, ZnO nanoparticles were synthesized via coprecipitation assisted by eucalyptus essential oil, which acted as stabilizing agent. The obtained materials showed a UV–vis absorption band near 360 nm and band gaps of 3.22 and 3.21 eV, confirming nanoparticle formation. FTIR analysis revealed functional groups associated with eucalyptus oil. XRD demonstrated a hexagonal wurtzite crystalline structure, with crystallite sizes of 16.17 nm for ZnO_400 and 11.77 nm for EZnO_400. DLS measurements showed hydrodynamic sizes of 945.6 nm and 240.4 nm for ZnO_400 and EZnO_400, respectively, indicating improved stabilization in the presence of eucalyptus oil. These findings highlight the effectiveness of eucalyptus essential oil in producing green ZnO nanoparticles with enhanced physicochemical properties and potential larvicidal applications.

Graphical abstract