Abstract
We describe the synthesis of nanocomposites, based on nanofibers of silicon carbide, silver nanoparticles, and cellulose. Silver nanoparticle synthesis was achieved with chemical reduction using hydrazine by adding two different surfactants to obtain a nanocomposite with silver nanoparticles of different diameters. Determination of antibacterial activity was based on respiration tests. Enzymatic analysis indicates oxidative stress, and viability testing was conducted using an epifluorescence microscope. Strong bactericidal activity of nanocomposites was found against bacteria Escherichia coli and Bacillus cereus, which were used in the study as typical Gram-negative and Gram-positive bacteria, respectively. It is assumed that reactive oxygen species generation was responsible for the observed antibacterial effect of the investigated materials. Due to the properties of silicon carbide nanofiber, the obtained nanocomposite may have potential use in technology related to water and air purification. Cellulose addition prevented silver nanoparticle release and probably enhanced bacterial adsorption onto aggregates of the nanocomposite material.
Highlights
Following a period of intensive fundamental research on nanostructured materials, their possible use in a variety of technologies is a new direction of research
We present the synthesis of a nanocomposite material based on silicon carbide (SiC) nanofibers, AgNPs, and cellulose (CE)
Micrographs were taken in backscattered electron mode to better visualize the silver nanoparticles
Summary
Following a period of intensive fundamental research on nanostructured materials, their possible use in a variety of technologies is a new direction of research. An important potential area of application of nanostructured materials is in water- and air-treatment technologies. For this reason, many studies have been published, where the possibility of synthesis of a wide variety of nanocomposites, based primarily on single- and multi-walled carbon nanotubes, and graphene, combined with metal and metal oxide nanoparticles, have been presented [1,2,3,4]. Very often, nanostructured carbon is treated as a nanoparticle carrier One such carrier is silicon carbide (SiC) nanofibers, which are chemically more stable than nanostructured carbon, and, have potential application in technologies based on filtering methods
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