Plant-Extract-Assisted Green Synthesis of Silver Nanoparticles Using Origanum vulgare L. Extract and Their Microbicidal Activities

Mohammed Rafi Shaik, Mujeeb Khan, Mufsir Kuniyil, Abdulrahman Al-Warthan, Hamad Z. Alkhathlan, Mohammed Rafiq H. Siddiqui, Jilani P. Shaik, Anis Ahamed, Adeem Mahmood, Merajuddin Khan and Syed Farooq Adil
Additional contact information
Mohammed Rafi Shaik: Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Mujeeb Khan: Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Mufsir Kuniyil: Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Abdulrahman Al-Warthan: Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Hamad Z. Alkhathlan: Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Mohammed Rafiq H. Siddiqui: Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Jilani P. Shaik: Department of Biochemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Anis Ahamed: Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Adeem Mahmood: Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Merajuddin Khan: Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Syed Farooq Adil: Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia

Sustainability, 2018, vol. 10, issue 4, 1-14

Abstract: Plant-mediated green synthesis of nanomaterials has been increasingly gaining popularity due to its eco-friendly nature and cost-effectiveness. In the present study, we synthesized silver nanoparticles (AgNPs) by using an aqueous solution of Saudi Origanum vulgare L. plant extract as a bioreducing agent. The as-synthesized AgNPs were characterized using various microscopic and spectroscopic techniques. The results indicated the formation of crystalline face-centered cubic ( fcc ) AgNPs. Additionally, FT-IR study confirmed that the O. vulgare L. extract not only functioned as a bioreductant but also stabilized the surface of the AgNPs by acting as a capping agent. Moreover, the effect of the amount of the plant extract on the size and the antimicrobial activity of the NPs was also assessed. It was found that with increasing amounts of plant extract, the size of the NPs was decreased. Moreover, as-synthesized AgNPs as well as O. vulgare L. plant extract were separately tested to examine their antimicrobial activities. The activities were tested against various bacterial and fungal microorganisms including Shigella sonnei , Micrococcus luteus , Escherichia coli , Aspergillus flavus , Alternaria alternate , Paecilomyces variotii , Phialophora alba , and so on. These results evidently show that the inclusion of O. vulgare L. extracts improves the solubility of AgNPs, which led to a significant enhancement in the toxicity of the NPs against the assessed microorganisms.

Keywords: Origanum vulgare L. extract; silver NPs; green synthesis and antimicrobial activity (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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