Abstract
This paper presents the synthesis and characteristics of Fe3O4/C/TiO2 hybrid magnetic nanomaterials with antibacterial properties. The materials used were obtained using a microwave-assisted two-stage precipitation method. In the first stage, magnetite nanoparticles (Fe3O4) were prepared with the precipitation method, during which an additional glucose layer was placed on them. Next, the surface of Fe3O4 nanoparticles was covered by TiO2. It was observed that the addition of carbon and titanium dioxide caused a decrease in the average size of magnetite crystallites from 15.6 to 9.2 nm. Materials with varying contents of anatase phase were obtained. They were characterized in terms of phase composition, crystallite size, specific surface area, surface charge and the kinds of function groups on the surface. The results show a successful method of synthesizing hybrid magnetic nanoparticles, stable in a solution, with antibacterial properties under direct solar light irradiation. Compared to classical materials based on TiO2 and used for water disinfection, the obtained photocatalytic nanomaterials have magnetic properties. Owing to this fact, they can be easily removed from water once their activity under direct irradiance in a given process has completed.
Highlights
Over recent years, the incidence and mortality rates of infectious diseases caused by airborne pathogenic bacteria have been on the increase
This paper presents the synthesis and characteristics of magnetic nanomaterials based on iron (II and III) oxide nanoparticles covered by a layer of surfactant and titanium dioxide
The results presented in this work are promising, showing that Fe3 O4 /C/TiO2 can be advantageous compared to a in classical, plain and offers powerful and
Summary
The incidence and mortality rates of infectious diseases caused by airborne pathogenic bacteria have been on the increase. Such infections are the cause of a minimum of 4 million deaths annually [1]. Another pressing problem the world has experienced recently is antibiotic resistant bacteria (ARB). Some nanomaterials, including metal oxides, with antimicrobial properties have already been developed owing to interdisciplinary research. Their high specific surface area maximizes interaction with microbiological membrane. The main mechanism of their microbial inhibition is to trigger oxidative stress by boosting the amount of reactive oxygen species (ROS) [4]
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