TiO2 nanoparticles suppress Escherichia coli cell division in the absence of UV irradiation in acidic conditions

Zhukova, L. V.; Kiwi, J.; Nikandrov, V. V.

doi:10.1016/j.colsurfb.2012.03.010

Cited by 43 publications

(31 citation statements)

References 42 publications

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“…TiO 2 0.1 fabric. In addition, the latest studies showed that TiO 2 NPs can interact with bacteria even in the absence of UV light (Dalai et al 2012;Zhukova et al 2012). Radicals generated from TiO 2 NPs in anatase form under non-UV conditions may trigger cytotoxicity (Dalai et al 2012).…”

Section: Biodegradation Behavior Of Co Fabricsmentioning

confidence: 98%

Negative influence of Ag and TiO2 nanoparticles on biodegradation of cotton fabrics

et al. 2015

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Recently, many efforts have been made to efficiently impregnate different textile materials with metal and metal oxide nanoparticles in order to provide antimicrobial, UV protective or self-cleaning properties. Evidence of their environmental risks is limited at this point. The aim of this study was to explore the influence of Ag and TiO 2 nanoparticles on biodegradation of cotton fabrics. Biodegradation behavior of cotton fabrics impregnated with Ag and TiO 2 NPs from colloidal solutions of different concentrations was assessed according to standard test method ASTM 5988-03 and soil burial test.Degradation of cotton fabrics was also evaluated by enzymatic hydrolysis with cellulase. The morphology of fibers affected by biodegradation was analyzed by scanning electron microscopy (SEM). In order to get better insight into biodegradation process, dehydrogenase activity of soil has been determined. Ag and particularly TiO 2 nanoparticles suppressed the biodegradation of cotton fabrics. The dehydrogenase activity of soil with cotton fabrics impregnated with TiO 2 nanoparticles was the weakest. Severe damage of cotton fibers during the biodegradation process was confirmed by SEM.

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Section: Biodegradation Behavior Of Co Fabricsmentioning

confidence: 98%

Negative influence of Ag and TiO2 nanoparticles on biodegradation of cotton fabrics

et al. 2015

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“…However, relatively few studies have dealt with the direct effects of TiO 2 NPs on bacteria. To date, most of the literature has focused on its photocatalytic applications under UV light (McCullagh et al 2007;Pigeot-Rémy et al 2011) and few studies have reported E. coli inactivation in the absence of light due to bacteria-TiO 2 NP interactions (Foster et al 2011;Swayamprava et al 2012;Zhukova et al 2012;Nesic et al 2014;Erdem et al 2014). A limited number of studies have shown the effects of particle size on bacteria.…”

Section: Introductionmentioning

confidence: 98%

The short-term toxic effects of TiO2 nanoparticles toward bacteria through viability, cellular respiration, and lipid peroxidation

Erdem

Metzler

Daniel

et al. 2015

Environ Sci Pollut Res

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To better understand the potential impacts of metal oxide nanoparticles (NPs) on Gram(+) Bacillus subtilis and Gram(-) Escherichia coli (K12) bacteria, eight different nanosized titanium dioxide (TiO2) suspensions with five different concentrations were used. Water quality parameters (pH, temperature, and ionic strength), light sources, and light intensities were also changed to achieve different environmental conditions. The photosensitive TiO2 NPs were found to be harmful to varying degrees under ambient conditions, with antibacterial activity increasing with primary particle sizes from 16 to 20 nm. The presence of light was a significant factor under most conditions tested, presumably due to its role in promoting generation of reactive oxygen species (ROS). However, bacterial growth inhibition was also observed under dark conditions and different water quality parameters, indicating that undetermined mechanisms additional to photocatalytic ROS production were responsible for toxicity. The results also indicated that nano-TiO2 particles in the absence and the presence of photoactivation induced lipid peroxidation and cellular respiration disruption.

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“…The isoelectric point of TiO 2 is 6.8. TiO 2 is positively charged when pH \ 6.8 and negatively charged when pH [ 6.8 [28]. In aqueous solution, TiO 2 is positively charged and therefore owns higher absorption toward anionic dyes.…”

Section: Photocatalytic Performance Of the Tio 2 :05 Mol% Gd 31 Hollmentioning

confidence: 99%

Preparation of Gd-doped TiO2 hollow spheres with enhanced photocatalytic performance

Yan

Hou

et al. 2015

J Sol-Gel Sci Technol

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Using (C 16 H 36 O 4 )Ti, Gd 2 O 3 and HNO 3 as raw materials, TiO 2 and TiO 2 :Gd 3? hollow spheres with different Gd dopant concentrations of 0.25, 0.5, 1, 1.5 and 2 mol% were obtained with the assistance of the carbon sphere templates. The morphology, structure, specific surface area and photocatalytic properties of the prepared hollow spheres were studied by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Brunauer-Emmett-Teller and UV-Vis 2550 spectrophotometer, respectively. Several factors influencing the photocatalytic activities of the samples were studied, which include pH value of the solutions, Gd dopant concentrations, amount of the additive catalysts and types of the dyes. Graphical Abstract In this work, fabrication of TiO 2 : Gd 3? hollow spheres (b) was obtained with the assistance of the carbon sphere template (a). Characterization of the samples was also reported in this paper.

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TiO2 nanoparticles suppress Escherichia coli cell division in the absence of UV irradiation in acidic conditions

Cited by 43 publications

References 42 publications

Negative influence of Ag and TiO2 nanoparticles on biodegradation of cotton fabrics

Negative influence of Ag and TiO2 nanoparticles on biodegradation of cotton fabrics

The short-term toxic effects of TiO2 nanoparticles toward bacteria through viability, cellular respiration, and lipid peroxidation

Preparation of Gd-doped TiO2 hollow spheres with enhanced photocatalytic performance

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