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Optimization preparation of the biosynthesis of silver nanoparticles using watermelon and study of its antibacterial activity

Alzahrani, Eman; Welham, Kevin


Eman Alzahrani

Kevin Welham


The field of nanotechnology is the most active area of research in modern materials science. There is increased demand on nanoparticles because of their wide applicability in various areas; for example, electronics, catalysis, chemistry, energy and medicine. Commonly, silver nanoparticles are fabricated using toxic and flammable chemicals. Therefore, the aim of this work is to find a cost effective and environment-friendly technique for green synthesis of silver nanoparticles from silver nitrate (AgNO3) solution using watermelon extract. The different parameters were optimised for the fabrication of silver nanoparticles including the contact time, concentration of watermelon extract, concentration of silver nitrate solution, reactant ratio, and reaction temperature. The fabricated nanoparticles were characterised using different instruments such as UV-Vis spectrophotometry and their size determined by transmission electron microscopy (TEM), while the element composition of the sample was obtained from the energy dispersive X-ray (EDX) spectrum. The antibacterial effect of the fabricated silver nanoparticles against two human pathogens Escherichia coli (E. coli) and Staphylococcus aureus (S.aureus) was studied and the obtained results confirm the fact that SNPs have the antibacterial property of nanoparticles.


Alzahrani, E., & Welham, K. (in press). Optimization preparation of the biosynthesis of silver nanoparticles using watermelon and study of its antibacterial activity. International Journal of Basic and Applied Sciences, 3(4), 392.

Journal Article Type Article
Acceptance Date Sep 26, 2014
Online Publication Date Sep 26, 2014
Deposit Date May 7, 2019
Publicly Available Date Oct 27, 2022
Journal International Journal of Basic and Applied Sciences
Print ISSN 2227-5053
Publisher Science Publishing Corporation
Peer Reviewed Peer Reviewed
Volume 3
Issue 4
Article Number 3358
Pages 392
Keywords Synthesis silver nanoparticle; Watermelon extract; Green chemistry; Antibacterial activity
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Copyright Statement
Copyright © 2014 Eman AlzahraniandKevin Welham. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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