Abstract
In this paper, nanoparticles of silver, copper, and iron were prepared by biological green synthesis method by herbal extracts of pomegranate leaves, dry powder of oak fruit, pistachio skin, and green tea as chemical reduction agents. The structural, optical, and antibacterial properties of silver, copper, and iron nanoparticles against Gram-negative bacteria K. pneumonia, S. enteritidis, E. coli, and Gram-positive B. cereus and S. aureus were investigated. The crystal structure and particle distribution of the prepared nanoparticles were studied by XRD and SEM analysis. The optical absorption and band gap of silver, copper, and iron nanoparticles prepared with plant extracts were determined by ultraviolet–visible spectroscopy (UV–Vis). To know the presence of organic substances in the synthesized nanoparticles, the absorption spectrum in the infrared region was investigated using a Fourier transform infrared spectroscopy (FTIR). The results of the XRD analysis show the formation of the structure of the face center cubic (fcc) for silver and copper nanoparticles and structure of the body center cubic (bcc) for iron nanoparticle. In addition, the obtained XRD analysis shows that the average size of prepared silver, copper, and iron nanoparticles is 26.5, 24.6, and 45.0 nm, respectively. Our calculations show that the band gap of silver, copper, and iron metal nanoparticles is between 1.3–1.4 eV, 2.15 eV and 1.46 eV, respectively. The silver and copper nanoparticles have good antimicrobial properties in low concentrations against Gram-negative bacteria E. coli.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request. All data generated or analyzed during this study are included in this published article.
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by RK, MMBM, and MK. The first draft of the manuscript was written by RK and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Kashi, R., Bagheri-Mohagheghi, M.M. & Khorshidi, M. Synthesis and study of structural, optical, and antibacterial properties of silver, copper, and iron metallic nanoparticles prepared by green synthesis. Appl Nanosci 13, 4343–4360 (2023). https://doi.org/10.1007/s13204-022-02700-6
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DOI: https://doi.org/10.1007/s13204-022-02700-6