Abstract
Our research was focused on the evaluation of the photocatalytic and antimicrobial properties, as well as biocompatibility of cotton fabrics coated with fresh and reused dispersions of nanoscaled TiO2-1% Fe-N particles prepared by the hydrothermal method and post-annealed at 400 °C. The powders were characterized by X-ray diffraction (XRD), Mössbauer spectroscopy and X-ray photoelectron spectroscopy. The textiles coated with doped TiO2 were characterized by scanning electron microscopy and energy dispersive X-ray analyses, and their photocatalytic effect by trichromatic coordinates of the materials stained with methylene blue and coffee and exposed to UV, visible and solar light. The resulting doped TiO2 consists of a mixture of prevailing anatase phase and a small amount (~15%–20%) of brookite, containing Fe3+ and nitrogen. By reusing dispersions of TiO2-1% Fe-N, high amounts of photocatalysts were deposited on the fabrics, and the photocatalytic activity was improved, especially under visible light. The treated fabrics exhibited specific antimicrobial features, which were dependent on their composition, microbial strain and incubation time. The in vitro biocompatibility evaluation on CCD-1070Sk dermal fibroblasts confirmed the absence of cytotoxicity after short-term exposure. These results highlight the potential of TiO2-1% Fe-N nanoparticles for further use in the development of innovative self-cleaning and antimicrobial photocatalytic cotton textiles. However, further studies are required in order to assess the long-term skin exposure effects and the possible particle release due to wearing.
Highlights
The photodegradation of different environmental pollutants by photocatalysts, such as titanium dioxide (TiO2 ), is one of the most studied processes
The X-ray diffraction (XRD) patterns consisted of two phases: a prevailing tetragonal anatase phase (ICSD #9855) accompanied by the orthorhombic brookite (ICSD #15409) phase
In this report forfor thethe firstfirst timetime the antimicrobial activity and biocompatibility of cotton thisstudy, study,we we report the antimicrobial activity and biocompatibility of textiles impregnated with TiOwith
Summary
The photodegradation of different environmental pollutants by photocatalysts, such as titanium dioxide (TiO2 ), is one of the most studied processes. Between many advantages, such as mineralization of toxic and bio-resistant organic compounds [1,2,3], and the inactivation of pathogenic microorganisms [4], one of the main limitations of using TiO2 is the high quantity needed to obtain the desired effect. TiO2 -1% Fe-N dispersion resulting from the textiles’ treatment By this approach, one could expect to reduce the amount of doped TiO2 released into the environment and, by using the same treatment bath, to decrease the consumption of water and chemicals
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