Green-synthesized NiO Nanoparticles via Laurus nobilis Leaf Extract: Structural and Optical Characterization
نویسندگان
1 Department of Chemistry and Biochemistry, Faculty of Sciences, Lebanese University, Beirut P.O. Box 6573/14, Lebanon
2 Department of Chemistry, Faculty of Arts and Sciences, American University of Beirut, Beirut, Lebanon
3 Department of Chemistry and Biochemistry, Faculty of Sciences, Lebanese University, Beirut P.O. Box 6573/14, Lebanon
4 Department of Chemistry, Faculty of Arts and Sciences, American University of Beirut, Beirut, Lebanon
5 Department of Chemistry and Biochemistry, Faculty of Sciences, Lebanese University, Beirut P.O. Box 6573/14, Lebanon
6 Hospitality, Faculty of Tourism, Islamic University of Lebanon, Khaldeh P.O. Box 30014, Lebanon
doi
10.48309/ajca.2026.573780.2048چکیده
In this study, nickel oxide (NiO) nanoparticles were synthesized via a green and eco-friendly method using Laurus nobilis (bay leaf) extract as a reducing and stabilizing agent. The synthesis was performed under mild conditions, followed by calcination at 550 °C, resulting in nanoscale NiO particles. The nanoparticles were thoroughly characterized using UV–Visible spectroscopy, X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). UV–Vis analysis revealed an optical bandgap of 3.93 eV, indicating quantum confinement effects associated with the nanoscale dimensions. XRD confirmed the formation of a crystalline cubic structure with an average crystallite size of 15.4 nm, while SEM images showed predominantly spherical nanoparticles with some degree of aggregation. FTIR spectroscopy indicated the presence of Ni–O bonds and plant-derived functional groups, responsible for nanoparticle stabilization. This study demonstrates a simple, reproducible, and environmentally benign route for synthesizing well-defined NiO nanoparticles, providing a foundation for potential applications in catalysis, electronics, sensors, and other nanotechnology-related fields.
