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    Antibacterial Properties of Different Ratio Ce Doped TiO2 Nanofibers Prepared by Electrospinning Process
    (Amer Scientific Publishers, 2018) Bezir, Nalan Cicek; Evcin, Atilla; Senol, Emine; Ozcan, Burcu; Kir, Esengul; Akarca, Gokhan; Cetin, Emel Sesli
    The aim of this study was to prepare PVP/TiO2 nanofibers containing Cerium and investigate antibacterial properties of prepared nanofibers. In order to see the influence Ce doped at different ratios on the properties of TiO2 nanofibers, we prepared one pure TiO2 and Ce doped TiO2 nanofiber samples successfully by electrospinning method. 1, 2, 3, 4, and 5 wt% Ce doped TiO2 nanofibers produced at constant voltage 20 kV, constant height 8 cm and with a constant rate 0.1 mL/h. The antibacterial activities of the nanofibers were tested by using Staphylococcus aureus. The results showed that the antibacterial activity of TiO2 improves with doping of Ce. Characterization of the prepared samples was performed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and the differential thermal analysis/the thermal gravimetric analysis (DTA/TGA) methods.
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    Investigation of Antibacterial Properties of Ag Doped TiO2 Nanofibers Prepared by Electrospinning Process
    (De Gruyter Poland Sp Zoo, 2018) Bezir, Nalan Cicek; Evcin, Atilla; Diker, Ramazan; Ozcan, Burcu; Kir, Esengul; Akarca, Gokhan; Cetin, Emel Sesli
    In this study, undoped and 1, 2, 3, 4, and 5 wt % Ag-doped TiO2 nanofibers have been fabricated by the electrospinning method applying 20 kV voltages at 8 cm height with a flow rate 0.1 mL/h. The antibacterial properties of undoped and doped Ag/TiO2 nanofibers were tested on Staphylococcus aureus bacteria. The antibacterial effect of these fabricated nanofibers has been determined by disc diffusion and Baird parker methods. The results have shown that Ag/TiO2 nanofibers have an excellent antibacterial effect on this bacterium compared to pure TiO2 nanofibers. As a result, developed nanofibers can easily be applied in various fields such as biomedical sector and tissue engineering. In addition, the chemical components, morphology, and crystal structure of the nanofibers have been performed by scanning electron microscopy energy dispersive analysis (SEM-EDX), differential thermal analysis/thermal gravimetric analysis (DTA/TG), and X-ray diffraction (XRD) methods.