A novel green one-step synthesis of silver nanoparticles using chitosan: catalytic activity and antimicrobial studies

Maragoni Venkatesham,Dasari Ayodhya,Nagati Veera Babu,Alle Madhusudhan,Guttena Veerabhadram

doi:10.1007/s13204-012-0180-y

Maragoni Venkatesham, Dasari Ayodhya + Show 3 more

Open Access

https://doi.org/10.1007/s13204-012-0180-y

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Journal: Applied nanoscience	Publication Date: Dec 16, 2012
Citations: 192	License type: CC BY 2.0

Affiliation: Osmania University

Abstract

Stable silver nanoparticles were synthesized using chitosan acting as both reducing and stabilizing agent without using any toxic chemicals. This reaction was carried out in an autoclave at a pressure of 15 psi and 120 °C temperature by varying the time. The influence of different parameters such as time, change of concentration of silver nitrate and concentration of chitosan on the formation of silver nanoparticles were studied. The synthesized silver nanoparticles were characterized by UV–visible spectroscopy, Fourier transform infrared, X-ray diffraction and transmission electron microscopy. The results of catalytic reduction of 4-nitrophenol by sodium borohydride in the presence of green synthesized silver nanoparticles were presented. The antimicrobial activity of silver nanoparticles was tested against Escherichia coli and Micrococcus luteus and was found to be possessing inhibiting property.

Highlights

Metallic nanoparticles have been widely studied in recent years because of their potential use as catalysts (Chimentao et al 2004; Gong and Mullins 2009; Campelo et al 2009; Li et al 2010)
We report the green synthesis of silver nanoparticles using chitosan as both reducing and stabilizing agent and without using any toxic chemicals
We report the catalytic activity of green synthesized silver nanoparticles toward 4-nitrophenol reduction and microbial activity toward Gram-positive and Gram-negative bacteria

Summary

Introduction

Metallic nanoparticles have been widely studied in recent years because of their potential use as catalysts (Chimentao et al 2004; Gong and Mullins 2009; Campelo et al 2009; Li et al 2010). Abstract Stable silver nanoparticles were synthesized using chitosan acting as both reducing and stabilizing agent without using any toxic chemicals. The results of catalytic reduction of 4-nitrophenol by sodium borohydride in the presence of green synthesized silver nanoparticles were presented.

Results

Conclusion