Abstract
An economically viable and “green” process has been developed for the synthesis of silver nanoparticles (AgNPs) with an average size of 7 nm using non-toxic and renewable salmalia malabarica gum (SMG) as reducing and capping agent without using any chemical reducing agent. The effect of various parameters such as concentration of SMG and silver nitrate and reaction time for the synthesis of AgNPs was studied. The synthesized AgNPs are systematically characterized by UV/Vis spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction and Transmission electron microscopy. The resultant SMG-capped AgNPs are highly stable and had significant antibacterial action on both Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). The catalytic action of the SMG-capped AgNPs to initiate the reduction of 4-nitrophenol (4-NP) in the presence of NaBH4 has also been reported. The kinetics of the reaction was found to be of pseudo-first-order with respect to the 4-NP.
Highlights
Nowadays much attention has been focused on metal nanoparticles such as silver, gold, platinum, and copper as their properties may significantly differ from their respective bulk metals (Burda et al 2005)
In this study, autoclaving method was adopted as a pseudo-synthetic route to produce sterile silver nanoparticles that are completely free from viruses, bacteria, and spores, and these sterile silver nanoparticles may find biological applications
Green synthesis of AgNPs was carried out using salmalia malabarica gum (SMG) as both capping and reducing agent, and water as solvent
Summary
Nowadays much attention has been focused on metal nanoparticles such as silver, gold, platinum, and copper as their properties may significantly differ from their respective bulk metals (Burda et al 2005). The effect of various parameters such as concentration of SMG and silver nitrate and reaction time for the synthesis of AgNPs was studied.
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