Abstract
One antibacterial material was prepared from exfoliated graphite (EG) decorated with silver nanoparticles (AgNPs). The EG was prepared by the graphite intercalated compound process, AgNPs were prepared by chemical reduction of AgNO3 in the presence of NaBH4. The AgNPs-loaded EG (Ag-EG) composite was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), nitrogen adsorption, mercury intrusion porosimetry, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The antibacterial effect of the Ag-EG was evaluated by using the zone of inhibition method. The loaded AgNPs were highly dispersed on EG sheets and most of them have a size less than 10 nm. The Ag loading slightly increased the surface area of EG. It is shown that the Ag-EG had antibacterial activity and anti-adhesion properties against Pseudomonas aeruginosa and Staphylococcus aureus. It suggests that Ag-EG composites could be used in a variety of industrial applications that require an antibacterial effect.
Highlights
IntroductionMicrobial pollution caused by microorganisms has produced various problems in daily life (wound infection) and industry (wastewater discharge)
Microbial pollution caused by microorganisms has produced various problems in daily life and industry
Ag-Graphite Intercalation Compounds (GICs) in a quartz beaker with scale were put into an electric muffle furnace by rapid heating at 950 ◦ C for a few seconds, Ag nanoparticles (AgNPs)-loaded exfoliated graphite (EG) was obtained until the volume of EG was not changed
Summary
Microbial pollution caused by microorganisms has produced various problems in daily life (wound infection) and industry (wastewater discharge). Practical applications of AgNPs may lose antibacterial activity owing to aggregation among particles [5,6]. With huge specific surface area, proper micropores and excellent adsorption capacity, porous carbon materials have been widely used in wastewater treatments [12] and antibacterial support materials. Sci. 2017, 7, 852 carbon materials, and endow them with antibacterial activity. Graphene, for AgNPs loading, is a favorable matrix because of their abundant functional groups and large surface areas. Ag-EG composite material keeps the electrical/thermal conductivity of EG, and its antibacterial effect gives it more extensive applications in industrial applications. Metal nanoparticles-supported carbon materials have been effectively used for biomedical applications including wound healing [29,30]. The antibacterial activities of Ag-EG composite materials were evaluated by using the zone of inhibition method
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