Synthesis and Characterization of Silver Nanoparticles from Ethanolic Extracts of Leaves of Annona muricata: A Green Nanobiotechnology Approach
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Date
2019
Journal Title
Journal ISSN
Volume Title
Publisher
Biotechnology Journal International
Abstract
The biological green synthesis of nanoparticles via nanobiotechnology processes
have a significant potential to boost nanoparticles production without the use of harsh, toxic, and
expensive chemicals commonly used in conventional physical and chemical processes. Annona
muricata, a tropical plant belonging to family Annonaceae is one of the most used plants in folk
medicine because of its many medicinal uses and therefore presents a strong candidate for use in
green synthesis.
Aims: The aim of this study was to optimize a method for the synthesis of Silver Nanoparticles
(AgNPs) from ethanolic extracts of leaves of Annona muricata as well as to characterize the green
synthesized AgNPs.
Methodology: AgNPs were synthesized from Annona muricata leaves using AgNO3 solution. The
AgNPs were characterized using spectroscopy and microscopy techniques.
Results: The formed AgNPs had an absorption maximum at 429 nm using UV–Visible spectroscopy
and were stable under different pH, temperature, and storage conditions. Fourier transform infrared
analysis revealed the different functional groups responsible for the synthesis and stabilization of the
AgNPs. Scanning electron microscopy analysis revealed a spherical nature of the synthesized
AgNPs. Energy dispersive x-ray spectroscopy analysis showed presence of Ag, O, and Cl with Ag
having the highest composition at 60%. X-Ray Diffraction and Dynamic Light Scattering revealed a
crystalline nature of AgNPs with an average size of 87.36 nm and a polydispersity index of 0.16
respectively. Transmission Electron Microscopy analysis further confirmed the crystalline and
spherical nature of the AgNPs.
Conclusion: In this article, an efficient, eco-friendly and low-cost method for the synthesis and
recovery of stable AgNPs using Annona muricata leaves ethanolic extracts as both a reducing and
capping agent has been reported for the first time. The synthesized AgNPs could be promising
candidates for many biomedical, clinical, engineering, and polymer applications.
Description
Keywords
Annona muricata, Silver nanoparticles (AgNPs), UV/VIS, FTIR
Citation
Gavamukulya, Y., Maina, E. N., Wamunyokoli, F., Meroka, A. M., Madivoli, E. S., El-Shemy, H. A., & Magoma, G. (2019). Synthesis and characterization of silver nanoparticles from ethanolic extracts of leaves of Annona muricata: A green nanobiotechnology approach. Biotechnol. J. Int, 4, 1-18. DOI: 10.9734/BJI/2019/v23i430083