Zizyphus mauritiana extract-mediated green and rapid synthesis of gold nanoparticles and its antibacterial activity

Babak Sadeghi

doi:10.1007/s40097-015-0157-y

Abstract

In this study, we have used Zizyphus mauritiana (ZM) extracts and chloroauric acid (HAuCl4) for synthesis of gold nanoparticles, with a particle size ranging from 20 to 40 nm. The ZM extract, acts both as reducing and stabilizing agent. UV–visible spectroscopy, X-ray diffraction (XRD), Fourier transform infra red spectroscopy (FTIR), transmission electron microscopy, scanning electron microscopy (SEM), and X-ray energy dispersive spectrophotometer were performed to ascertain the formation of Au-NPs. It was observed that the growths of Au-NPs are stopped within 25 min of reaction time. The synthesized Au-NPs were characterized by a peak at 535 nm in the UV–visible spectrum. XRD confirmed the crystalline nature of the nanoparticles of 27 nm size. The FTIR result clearly showed that the extracts containing OH as a functional group act in capping the nanoparticles synthesis. Antibacterial activities of Au-NPs were tested against the growth of Gram-positive (S. aureus) using SEM. Therefore, green synthesis of gold nanoparticles with ZM extract, is beneficial from its biological and medical applications.

Highlights

In this study, we have used Zizyphus mauritiana (ZM) extracts and chloroauric acid (HAuCl4) for synthesis of gold nanoparticles, with a particle size ranging from 20 to 40 nm
Regarding the role of green chemistry, we have successfully demonstrated that size, shape and the antibacterial activity gold nanoparticles by the reduction of Au3? ions with bio-reductants Zizyphus mauritiana (ZM) largely depend on the nature of reducing agents, concentration and time of mixing of the reactants [34]
ZM leaves were collected from damavand of IRAN, and were cleaned with double distilled water and shade-dried for a week at room temperature and further ZM leaves were ground to powder and stored for further study

Summary

Introduction

We have used Zizyphus mauritiana (ZM) extracts and chloroauric acid (HAuCl4) for synthesis of gold nanoparticles, with a particle size ranging from 20 to 40 nm. Nanoparticles with small particle size and high surface to volume ratio exhibit new and unique properties in comparison with bulk materials, which make them attractive for use in biomedical science. For this reason, in recent years a great deal of effort has been expended to use natural materials as benign reagents in nanoparticles synthesis [6,7,8,9]. Kumar and Yadav [12] have reviewed the use of plants and their extracts in the synthesis of metallic nanoparticles for various human applications

Methods

Results

Conclusion