Synthesis and Characterization of Syzygium Cumini Leaves Mediated Nickel Oxide Nanoparticles

Bawa Emmanuel, Mashingil P Moses, Dhlamini Mokhotjwa, Mohammed B Hudu, Solomon A Mamuru, Samuel Egga
2025-07-31 166 views 3 downloads

 

Nickel oxide (NiO) nanoparticles possess unique properties that make them highly valuable for applications in energy storage, catalysis, sensors, and biomedicine. Conventional synthesis routes often involve toxic chemicals and high energy requirements, posing environmental concerns. In this study, NiO nanoparticles were successfully synthesized via a green synthesis route using Syzygium cumini leaf extract as both a natural reducing agent and capping agent. The optical properties were monitored through UV-Vis spectroscopy, revealing the transformation from nickel chloride to NiO nanoparticles with a distinct absorption shift from ~394 nm to ~286 nm, confirming nanoparticle formation and semiconducting behavior. Phytochemicals screening results and Fourier Transform Infrared (FTIR) analysis identified functional groups in the extract, including phenols, flavonoids, and carboxylic groups, suggesting their role in reduction and stabilization. Scanning Electron Microscopy (SEM) images showed aggregated nanoparticles with irregular crystalline morphology, while X-ray diffraction (XRD) confirmed a face-centered cubic phase with an average crystallite size of 15.5 nm. The study demonstrates the effectiveness of S. cumini extract in producing NiO nanoparticles sustainably and highlights the potential of plant-mediated routes for environmentally friendly nanomaterial synthesis.

 

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