Abstract
This research aims to investigate the microstructural, optical, and antibacterial properties of silver (Ag) doped titanium dioxide (TiO2) and titanium dioxide - polyvinyl alcohol (TiO2/PVA) nanocomposite powders synthesized by the sol-gel method. The powder state characterization of the nanocomposite powders was performed with SEM, EDS, XRD, laser particle size, specific surface area, density measurements, UV-vis analysis, and antibacterial tests. SEM examinations demonstrated that titanium dioxide nanoparticles synthesized using PVA dopant have relatively spherical morphology. It detected that pure, Ag-doped TiO2 and Ag-doped TiO2/PVA nanocomposite powders are in an anatase phase by XRD microanalysis. The existence of silver in the nanocomposite powders was detected by EDS analysis, XRD, and UV-vis in peak shifts. The silver and polymer dopings were decreased surface area and density values for the TiO2 system. The addition of Ag to the nanocomposite powders significantly improved the antibacterial properties of the synthesized TiO2 and TiO2/PVA nanocomposite powders against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). However, it determined that the antibacterial activity effect was little on E. coli compared to S. aureus.
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