Research Article
Characterization and Antimicrobial Activity of Silver Nanoparticles Biosynthesised from Some Medicinal Plant Extracts of Benin
Issue:
Volume 13, Issue 1, March 2025
Pages:
1-15
Received:
16 December 2024
Accepted:
3 January 2025
Published:
10 February 2025
Abstract: The use of plant extract as a bio reductant for the synthesis of silver nanoparticles has attracted the attention of several researchers due to its rapid, non-pathogenic and economical protocol. This innovative approach in Benin offers an alternative in medical therapy face of antimicrobial resistance, which is a real public health problem. This study aims to characterize biosynthesized silver nanoparticles (AgNPs) and evaluate the antibacterial activity of synthesized silver nanoparticle from the aqueous extracts of the leaves of Caesalpinia bonduc, Dialium guineense, Momordica charantia, Moringa oleifera, Pavetta corymbosa, Psidium guajava, derived from the flora of Benin. The leaves of plants was collected, authenticated and extracted by water. The synthesized AgNPs by the aqueous extracts were characterized using UV-Vis spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) analysis. These characterization techniques allowed to determine the size, shape, crystalline nature, morphology, and the functional groups responsible for the reduction and stabilization of the nanoparticles. The antibacterial activity of AgNPs was determined against six different nosocomial bacteria by the standard disk diffusion method. The results confirmed the successful biosynthesis of AgNPs from the leaves of the six plants as indicated by a colour change from light yellow to brown and grey black. The UV-Vis spectroscopic analysis presented a surface plasmon resonance spectrum with absorption maxima ranging from 340 to 500 nm. XRD analysis demonstrated that the synthesized AgNPs possess a crystalline structure from 1 to 2 μm. In addition, the antimicrobial activities of AgNPs synthesized as reducing agents and stabilizers were investigated against nosocomial bacteria, which are nosocomial infectious agent. Collectively, the findings from this study clearly indicate that the aqueous extracts of the six plants have significant potential for the biosynthesis of silver nanoparticles. The bioactive compounds in the plant extracts were effective in synthesizing AgNPs, and this biological efficiency suggests the potential for incorporating these biosynthesized silver nanoparticles into food and pharmaceutical products.
Abstract: The use of plant extract as a bio reductant for the synthesis of silver nanoparticles has attracted the attention of several researchers due to its rapid, non-pathogenic and economical protocol. This innovative approach in Benin offers an alternative in medical therapy face of antimicrobial resistance, which is a real public health problem. This st...
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Research Article
Green Synthesis of Silver Nanoparticles Using Water Hyacinth Leaf Extract for Colorimetric Detection of Heavy Metal Ions
Issue:
Volume 13, Issue 1, March 2025
Pages:
16-27
Received:
6 February 2025
Accepted:
20 February 2025
Published:
6 March 2025
DOI:
10.11648/j.nano.20251301.12
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Abstract: The green synthesis of silver nanoparticles have attracted many researchers due to their wide range of applications. The objective of this study is to synthesize silver nanoparticles using water hyacinth extract for the detection of metal ions in aquatic solutions. In the present study, the silver nanoparticles synthesis employing the leaf extract of water hyacinth as the capping and reducing agent has been reported. The particles showed absorption maxima at 406 nm establishing the formation of silver nanoparticles. The particles were characterized by FTIR, XRD, SEM-EDX, TEM and Zeta Potential. The polyphenols present in the leaf extract are accountable for reducing and the capping activity which was revealed in the FTIR spectra. XRD revealed the crystalline nature of the nanoparticles. The morphology, size and shape of the silver nanoparticles were investigated with the help of electron microscopy techniques. The silver nanoparticles are observed to be spherically shaped with an average diameter of 10.78 ± 4.61 nm. EDX spectra established the presence of elemental silver in the nanoparticles. A zeta potential of -31.7 mV was recorded indicating that the silver nanoparticles are stable. These biosynthesized silver nanoparticles were employed to detect metal ions in aqueous solutions and two metal ions (Hg2+ and Fe3+) at 1000 micro molar concentration were detected successfully. Thus, the results of the study indicate that the silver nanoparticles synthesized from water hyacinth leaf extract have potential application in the detection of metal ions.
Abstract: The green synthesis of silver nanoparticles have attracted many researchers due to their wide range of applications. The objective of this study is to synthesize silver nanoparticles using water hyacinth extract for the detection of metal ions in aquatic solutions. In the present study, the silver nanoparticles synthesis employing the leaf extract ...
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