Abstract
ABSTRACTWe successfully synthesised TiO2 nanotubes (TNTs) and silver nanoparticles (Ag NPs)-loaded TiO2 nanotubes paste. These were coated on a glass substrate by spin coating method, and their antibacterial activities were surveyed. The morphology of materials was defined by transmission electron microscopy (TEM) image; the crystalline structure and the composition of the materials were determined by X-ray diffraction (XRD) pattern and X-ray photoelectron spectroscopy (XPS). Vibrational properties of the molecules existing in the sample were investigated by Fourier transform infrared (FTIR) spectroscopy, and the transmittances of films were determined by UV–Vis transmittance spectroscopy. This research shows that the structure and morphology of TNTs did not change after they underwent the processes of paste preparing and film coating on a glass substrate. Furthermore, the transmittance of TNTs film (about 75%) is higher than Ag NPs-loaded TiO2 nanotubes (Ag/TNTs) film (about 65%) in the visible region. Moreover, the antibacterial property of Ag/TNTs film shows its effectiveness against Escherichia coli bacteria, and the antibacterial efficiency is 99.06% for 24 h-incubation period in the dark condition.
Highlights
Bacteria concentrate the most on the surface of various objects such as fabric garment, sanitary equipment, and electronic devices
To improve the efficient surface area of this material system, TiO2 was synthesised in nanotubes (TNTs) form due to the one-dimensional structure of TNTs
After analysing the physicochemical properties of films made from TNTs and Ag NPs-loaded TiO2 nanotubes (Ag/TNTs) paste, we surveyed the bactericidal ability of the Ag/TNTs film for E. coli bacteria
Summary
Bacteria concentrate the most on the surface of various objects such as fabric garment, sanitary equipment, and electronic devices. To improve the efficient surface area of this material system, TiO2 was synthesised in nanotubes (TNTs) form due to the one-dimensional structure of TNTs. In addition, TNTs have an effectively large surface area, high mechanical strength, chemical stability, and are especially non-toxic [19,20]. The biggest disadvantages of the powder material are the limitation in the treatment of large surface and the retrieving of materials after use [24]. To overcome these difficulties, we transformed these materials from powder to a paste to facilitate the film- or spray-coating onto the surface of other materials and surveyed the structural stability, morphology as well as the transmittance and bactericidal ability against E. coli
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