Microwave-assisted green synthesis of silver nanoparticles from Fraxinus excelsior leaf extract and its antioxidant assay

Mehtab Parveen,Ali Mohammed Malla,Faheem Ahmad,Shaista Azaz

doi:10.1007/s13204-015-0433-7

Mehtab Parveen, Ali Mohammed Malla + Show 2 more

Open Access

https://doi.org/10.1007/s13204-015-0433-7

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Journal: Applied nanoscience	Publication Date: Mar 22, 2015
Citations: 132	License type: CC BY 4.0

Affiliation: Aligarh Muslim University

Abstract

The biosynthesis of nanoparticles has been proposed as a cost effective and environmentally benevolent alternative to chemical and physical methods. In the present study, microwave assisted synthesis of silver nanoparticles (AgNPs) has been demonstrated using leaf extract of Fraxinus excelsior reducing aqueous AgNO3 solution. The synthesized nanoparticles have been characterized on the basis of fourier transform infrared spectroscopy (FT-IR), UV–Vis spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive X-ray (EDX) analysis. The presence of a characteristic surface plasmon resonance (SPR) absorption band at 425 nm in UV–Vis reveals the reduction of silver metal ions into silver nanoparticles. FT-IR analysis was carried out to probe the possible functional group involved in the synthesis of AgNPs. Further leaf extracts and AgNPs were evaluated for antiradical scavenging activity by 1,1-diphenyl-2-picryl-hydrazyl (DPPH) assay.

Highlights

Exploitation of biological materials in synthesis of nanoparticles is one of the hottest thrust areas in the modern nanoscience
The synthesized nanoparticles have been characterized on the basis of fourier transform infrared spectroscopy (FT-IR), UV–Vis spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive X-ray (EDX) analysis
We report a simple, low cost, environmentally benign and microwave assisted green method for the synthesis of silver nanoparticles using the aqueous leaf extract of Fraxinus excelsior

Summary

Introduction

Exploitation of biological materials in synthesis of nanoparticles is one of the hottest thrust areas in the modern nanoscience. Most of the chemical and physical methods employed for the synthesis and production of nanoparticles involve the use of hazardous and toxic chemicals, low material conversions and high energy requirements. Green synthesis using biological organisms such as microorganisms (Otari et al 2012) and plant extracts (Kumar et al 2011) provides advancement over chemical and physical method as it is environmentally benevolent, simple, inexpensive, scaled up for large-scale synthesis and further there is no need to use high pressure, energy, temperature and toxic chemicals (Ramya and Subapriya 2012). We report a simple, low cost, environmentally benign and microwave assisted green method for the synthesis of silver nanoparticles using the aqueous leaf extract of Fraxinus excelsior. To the best of our knowledge, no reports pertaining to the microwave method for the synthesis of AgNPs using aqueous extract of Fraxinus excelsior leaves are yet available. The synthesized AgNPs were tested for antiradical screening activity

Materials and methods

Results and discussion

Conclusion