Algal-mediated Green Synthesis of Silver Nanoparticles and their Antibacterial Activity

Authors

• Yahya B. Alyoubi, Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia AND These authors contributed equally to this workFollow
• Hassan A. Ewais, Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia, Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef City, Egypt; AND These authors contributed equally to this workFollow
• Magda M. Aly, Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Saudi Arabia AND These authors contributed equally to this workFollow
• Walied M. Alarif, Department of Marine Chemistry, Faculty of Marine Science, King Abdulaziz University, Saudi Arabia AND These authors contributed equally to this workFollow

Abstract

A green, low-cost, and straightforward method was implemented for the synthesis of silver nanoparticles (AgNPs) using Digenea simplex Algal Extract (D. simplex). The formation of AgNPs was initially indicated by a golden yellow color of the solution and UV-Vis λ_max at 410 nm. Key factors such as reaction time, temperature, pH, concentrations of Ag⁺ and algal extract was also investigated. FTIR analysis confirmed the presence of alga-derived biomolecules which assets the reduction of silver ions. TEM analysis revealed the successful synthesis of spherical AgNPs with an average size of 12.86 ± 4.84 nm. The biosynthesized AgNPs exhibited a strong antibacterial activity against E. coli and S. marcescen with inhibition zones (19 mm). The result demonstrated the promising application of algal mediated AgNPs in the development of eco-friendly antibacterial agents.

First Page

202

Last Page

214

Recommended Citation

Alyoubi, Yahya B.; Ewais, Hassan A.; Aly, Magda M.; and Alarif, Walied M. (2026) "Algal-mediated Green Synthesis of Silver Nanoparticles and their Antibacterial Activity," The Journal of King Abdulaziz University: Science: Vol. 36: Iss. 1, Article 12.
DOI: https://doi.org/10.64064/1658-4252.1024

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This work is licensed under a Creative Commons Attribution 4.0 International License.