Synthesis of silver nanoparticles using medicinal Zizyphus xylopyrus bark extract

Babu Sumi Maria,Vidya Shetty Kodialbail,M B Saidutta,Aishwarya Devadiga

doi:10.1007/s13204-014-0372-8

Babu Sumi Maria, Vidya Shetty Kodialbail + Show 2 more

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https://doi.org/10.1007/s13204-014-0372-8

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Abstract

In the present paper, biosynthesis of silver nanoparticles using Zizyphus xylopyrus bark extract is reported. Z. xylopyrus bark extract is efficiently used for the biosynthesis of silver nanoparticles. UV-Visible spec- troscopy showed surface plasmon resonance peaks in the range 413-420 nm confirming the formation of silver nanoparticles. Different factors affecting the synthesis of silver nanoparticles like methodology for the preparation of extract, concentration of silver nitrate solution used for biosynthesis and initial pH of the reaction mixture were studied. The extract prepared with 10 mM AgNO3 solution by reflux extraction method at optimum initial pH of 11, resulted in higher conversion of silver ions to silver nanoparticles as compared with those prepared by open heating or ultrasonication. SEM analysis showed that the biosynthesized nanoparticles are spherical in nature and ranged from 60 to 70 nm in size. EDX suggested that the silver nanoparticles must be capped by the organic com- ponents present in the plant extract. This simple process for the biosynthesis of silver nanoparticles using aqueous extract of Z. xylopyrus is a green technology without the usage of hazardous and toxic solvents and chemicals and hence is environment friendly. The process has several advantages with reference to cost, compatibility for its application in medical and drug delivery, as well as for large-scale commercial production.

Highlights

Nanoparticles are extremely small structures, the synthesis of which is much more complicated than that of their macroscopic counterparts
Different factors affecting the synthesis of silver nanoparticles like methodology for the preparation of extract, concentration of silver nitrate solution used for biosynthesis and initial pH of the reaction mixture were studied
Scanning electron microscopy (SEM) analysis showed that the biosynthesized nanoparticles are spherical in nature and ranged from 60 to 70 nm in size

Summary

Introduction

Nanoparticles are extremely small structures, the synthesis of which is much more complicated than that of their macroscopic counterparts. Research in the field of nanotechnology has gained significant momentum as the properties demonstrated by these structures at the nanoscale level are remarkable in terms of their applicability (Duncan 2011). Silver nanoparticles have been the prime focus of the nanoparticles’ research industry due to their unique thermal (Moon et al 2005), electrical (Chen et al 2009) and optical (Kelly et al 2003) properties and because of the use of these structures in products that range from photovoltaics (Yoon et al 2010) to biological and chemical sensors (McFarland and Van Duyne 2003). Nanosilver is prepared by different methods including electrolysis, physical, chemical, and biological methods (Dubey et al 2010; Usha Rani and Reddy 2011).

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