Abstract
We report a facile and environmentally friendly approach to prepare Ag–Fe3O4–silk fiber nanocomposites. The Ag–Fe3O4–silk fiber acts as: (i) a biocompatible support for the silver nanoparticles; and (ii) a reducing agent for the silver ions. Neither additional reducing agents nor toxic organic solvents were used during the preparation process. The Ag–Fe3O4–silk fiber nanocomposites can be actuated by a small household magnet and have high antibacterial activities against both Escherichia coli and Staphylococcus aureus. These nanocomposites could be easily recycled without a decrease in their antibacterial activities due to the synergistic effects between the Ag NPs and Fe3O4 NPs with large amounts of active sites.
Highlights
Multi-component nanocomposites include two or more types of nanoparticles and have attracted increasing attention in catalysis, photography, electronic, antibacterial, and optical applications due to their unique functions [1,2]
As the most frequently used nanoparticles, magnetic iron oxide (Fe3 O4 and γ-Fe2 O3 ) nanoparticles and Ag nanoparticles have been employed in the synthesis of advanced nanocomposites
These Fe3 O4 and γ-Fe2 O3 nanoparticles with good biocompatibility and low toxicity can be used for bioseparation, targeted drug delivery, and magnetic resonance imaging [5,6,7,8,9]
Summary
Multi-component nanocomposites include two or more types of nanoparticles and have attracted increasing attention in catalysis, photography, electronic, antibacterial, and optical applications due to their unique functions [1,2]. As the most frequently used nanoparticles, magnetic iron oxide (Fe3 O4 and γ-Fe2 O3 ) nanoparticles and Ag nanoparticles have been employed in the synthesis of advanced nanocomposites These Fe3 O4 and γ-Fe2 O3 nanoparticles with good biocompatibility and low toxicity can be used for bioseparation, targeted drug delivery, and magnetic resonance imaging [5,6,7,8,9]. All of these applications required suitable stabilization of the magnetic nanoparticles to prevent their aggregation and chemical transformation. Ag NPs have two primary drawbacks including incomplete removal from the reaction medium and aggregation—this limits them to use in water
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