Fabrication of antibacterial silver nanoparticle‐modified chitosan fibers using Eucalyptus extract as a reducing agent

Abstract

Green chemical method could be a promising route to achieve large scale synthesis of nanostructures for biomedical applications. Here, we describe a green chemical synthesis of silver nanoparticles (Ag NPs) on chitosan-based electrospun nanofibers using Eucalyptus leaf extract. A series of silver salt (AgNO 3 ) amounts were added to a certain composition of chitosan/polyethylene oxide aqueous acetic acid solution. The solutions were then electrospun to obtain nanofibrous mats and then, morphology and size of nanofibers were analyzed by scanning electron microscopy (SEM). Incubation of AgNO 3 -containing mats into Eucalyptus leaf extract led to the formation of Ag NP clusters with average diameter of 91 6 24 nm, depicted by SEM and transmission electron microscopy. Surface enhanced Raman spectroscopy also confirmed formation of Ag NPs on the nanofibers. The mats also showed antimicrobial activity against Escherichia coli and Staphylococcus aureus bacteria with bigger inhibition zone for extract-exposed mats against S. aureus.

A Sustainable Approach to Fabricating Ag Nanoparticles/PVA Hybrid Nanofiber and Its Catalytic Activity

“…The whole process is made up of three steps: fabrication of Ag nanoparticles, formation of Ag nanoparticles/PVA hybrid solution and preparation of Ag nanoparticles/PVA hybrid nanofibers via an electrospinning technique. In comparison with the procedure described in a previous report [ 12 ], the present procedure can avoid reducing the silver ions slowly by the PVA in the PVA/AgNO 3 hybrid solution before electrospinning ( Figure S1 ), or reducing of the silver ions by a stainless steel needle tip during electrospinning the PVA/AgNO 3 hybrid solution [ 13 ].…”

Fabrication and catalytic behavior of hierarchically-structured nylon 6 nanofiber membrane decorated with silver nanoparticles

“…Silver nanoparticles (Ag NPs) are often loaded on a support material such as microspheres [3], beads [4], films [5], and fibers [6], which limits their agglomeration and improves their catalytic activity. In situ reduction [7] and post-processing [8] are two common methods for loading Ag NPs onto supports. In situ reduction is simple and convenient, but most Ag NPs are distributed within the support, with only a few exposed on the surface, which is therefore an inefficient use of Ag NPs.…”

Electrospun Nitrogen-doped TiO2 Nanofibrous Thin Film for Photovoltaic Application

“…Furthermore, randomly elongated lumps appear on N-doped TiO2/PVA composite fiber surface. It is speculated that these lumps ascribe to the dispersion of TiO2 nanoparticle and these results illustrate that TiO2 nanoparticles were consequently dispersed in PVA nanofiber [28]. Table 2 shows the mean diameter of undoped and N-doped TiO2/PVA nanofibers.…”