Effect of surfactants on photocatalytic toxicity of TiO2- based nanoparticles toward Vibrio fischeri marine bacteria

Baniamerian, Hamed; Tsapekos, Panagiotis; Alvarado-Morales, Merlin; Shokrollahzadeh, Soheila; Safavi, Maliheh; Angelidaki, Irini

doi:10.1016/j.inoche.2020.107936

Cited by 8 publications

(4 citation statements)

References 27 publications

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“…The inactivation of bacteria due to TiO 2 is thought to be attributed to reactive oxygen species (ROS) generated by the TiO 2 surface under UV irradiation. Specifically, the electrons and holes photogene-rated on the TiO 2 surface react chemically with O 2 and H 2 O in the air to generate O 2 − and OH radicals, respectively (Arcanjo et al, 2018;Baniamerian et al, 2020;Wu et al, 2020) . These ROS would attack the cell wall of bacteria adhering to the TiO 2 surface, damaging the cell membrane and destroying the cellular content (Dalrymple et al, 2010) .…”

Section: Notementioning

confidence: 99%

Remote Bactericidal Effect of Anatase TiO2 Photocatalytic Nanoparticles Annealed with Low-Temperature O2 Plasma

et al. 2022

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The remote bactericidal effect of TiO 2 photocatalyst, i.e., the bactericidal effect away from the photocatalyst, was successfully achieved using a humidified airflow. The TiO 2 photocatalyst used was anatase-type TiO 2 nanoparticles (NPs) annealed with a low-temperature O 2 plasma. For comparison, anatase-type TiO 2 NPs annealed in the air were used. The bacteria, Bacillus subtilis, were placed away from the TiO 2 NPs. The plasma-assisted-annealed TiO 2 NPs significantly inactivated 99% of the bacterial cells in 5 h, whereas the pristine and air-annealed TiO 2 NPs inactivated 88-90% of the bacterial cells. The remote bactericidal effect of plasmaassisted-annealed TiO 2 NPs would be attributed to a larger amount of H 2 O 2 molecules traveled by the airflow from the TiO 2 NPs. The molecules were generated by chemically reacting more photoexcited carriers on the TiO 2 surface with H 2 O and O 2 in the airflow. These photoexcited carriers originated from more oxygen-based species adsorbed and more oxygen vacancies introduced on the TiO 2 surface by the plasma-assisted-annealing. Key words ： Remote bactericidal effect / Anatase titanium dioxide nanoparticles / Plasma-assisted annealing / Reactive oxygen species / Hydrogen peroxide.

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Section: Notementioning

confidence: 99%

Remote Bactericidal Effect of Anatase TiO2 Photocatalytic Nanoparticles Annealed with Low-Temperature O2 Plasma

et al. 2022

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“…Furthermore, it is a simple, fast, robust, and cost-effective assay [68]. According to those characteristics, the bioluminescence test with A. fischeri is often chosen as the first test in ecotoxicological evaluations [72] and several studies have involved this test in toxicity evaluation of nanoparticles [67,[73][74][75][76][77][78] and nanostructured materials [62,79,80].…”

Section: Acute Toxicity Test With Aliivibrio Fischerimentioning

confidence: 99%

Cellular Responses Induced by Zinc in Zebra Mussel Haemocytes. Loss of DNA Integrity as a Cellular Mechanism to Evaluate the Suitability of Nanocellulose-Based Materials in Nanoremediation

et al. 2021

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Zinc environmental levels are increasing due to human activities, posing a threat to ecosystems and human health. Therefore, new tools able to remediate Zn contamination in freshwater are highly recommended. Specimens of Dreissena polymorpha (zebra mussel) were exposed for 48 h and 7 days to a wide range of ZnCl2 nominal concentrations (1–10–50–100 mg/L), including those environmentally relevant. Cellulose-based nanosponges (CNS) were also tested to assess their safety and suitability for Zn removal from freshwater. Zebra mussels were exposed to 50 mg/L ZnCl2 alone or incubated with 1.25 g/L of CNS (2 h) and then removed by filtration. The effect of Zn decontamination induced by CNS has been verified by the acute toxicity bioassay Microtox®. DNA primary damage was investigated by the Comet assay; micronuclei frequency and nuclear morphological alterations were assessed by Cytome assay in mussels’ haemocytes. The results confirmed the genotoxic effect of ZnCl2 in zebra mussel haemocytes at 48 h and 7-day exposure time. Zinc concentrations were measured in CNS, suggesting that cellulose-based nanosponges were able to remove Zn(II) by reducing its levels in exposure waters and soft tissues of D. polymorpha in agreement with the observed restoration of genetic damage exerted by zinc exposure alone.

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“…This attention is that TiO 2 -based photocatalysts have successfully decomposed various organic contaminants [1][2][3][4][5] and have efficaciously inactivated bacteria. [6][7][8][9][10] The use advantage of TiO 2 is that TiO 2 has high photocatalytic activity, high chemical stability, nontoxicity, excellent biocompatibility, and low cost compared with other metal oxide-based photocatalysts. [11][12][13][14] The photocatalytic activity of TiO 2 is driven by the irradiation of photons at energies larger than the bandgap energy of 3.0-3.2 eV (the bandgap wavelength of 388-415 nm).…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activity Enhancement of Anatase/Rutile‐Mixed Phase TiO₂ Nanoparticles Annealed with Low‐Temperature O₂ Plasma

Kawakami

Mimoto

Yanagiya

et al. 2021

Physica Status Solidi (a)

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Photodecomposition and photobactericidal activities of anatase/rutile-mixed phase TiO 2 nanoparticles annealed with low-temperature O 2 plasma are clarified by comparing them with those annealed in ambient air. The photocatalytic activities of plasma-assisted-annealed sample greatly enhance as compared with the untreated sample, under not only UV irradiation but also visible-light irradiation. The photocatalytic activities of air-annealed samples do not enhance under UV irradiation but enhance under visible-light irradiation. The enhanced photocatalytic activities due to the plasma-assisted annealing (PAA) originate from the increased photoexcited carrier concentration. This enhancement is discussed from PAA-induced characteristic factors. PAA facilitates the phase transformation to anatase, contributing directly to extending the photoexcited carrier lifetime. PAA introduces more oxygen vacancies, contributing to trapping more photogenerated electrons. PAA also introduces more bridging/terminal oxygen groups adsorbed on the surface, increasing the upward band-bending, the depletion layer width at the surface, and the charge transfer from rutile to anatase. These two introductions contribute to facilitating the separation of photoexcited carriers. Furthermore, PAA reduces the aggregate size of TiO 2 nanoparticles formed on the surface, contributing to increasing optical absorptions. More reactive oxygen species produced from the bridging/terminal oxygen groups by the photoexcited carriers will also enhance the photocatalytic activities.

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Effect of surfactants on photocatalytic toxicity of TiO2- based nanoparticles toward Vibrio fischeri marine bacteria

Cited by 8 publications

References 27 publications

Remote Bactericidal Effect of Anatase TiO<sub>2</sub> Photocatalytic Nanoparticles Annealed with Low-Temperature O<sub>2</sub> Plasma

Remote Bactericidal Effect of Anatase TiO<sub>2</sub> Photocatalytic Nanoparticles Annealed with Low-Temperature O<sub>2</sub> Plasma

Cellular Responses Induced by Zinc in Zebra Mussel Haemocytes. Loss of DNA Integrity as a Cellular Mechanism to Evaluate the Suitability of Nanocellulose-Based Materials in Nanoremediation

Photocatalytic Activity Enhancement of Anatase/Rutile‐Mixed Phase TiO₂ Nanoparticles Annealed with Low‐Temperature O₂ Plasma

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Effect of surfactants on photocatalytic toxicity of TiO2- based nanoparticles toward Vibrio fischeri marine bacteria

Cited by 8 publications

References 27 publications

Remote Bactericidal Effect of Anatase TiO<sub>2</sub> Photocatalytic Nanoparticles Annealed with Low-Temperature O<sub>2</sub> Plasma

Remote Bactericidal Effect of Anatase TiO<sub>2</sub> Photocatalytic Nanoparticles Annealed with Low-Temperature O<sub>2</sub> Plasma

Cellular Responses Induced by Zinc in Zebra Mussel Haemocytes. Loss of DNA Integrity as a Cellular Mechanism to Evaluate the Suitability of Nanocellulose-Based Materials in Nanoremediation

Photocatalytic Activity Enhancement of Anatase/Rutile‐Mixed Phase TiO2 Nanoparticles Annealed with Low‐Temperature O2 Plasma

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Photocatalytic Activity Enhancement of Anatase/Rutile‐Mixed Phase TiO₂ Nanoparticles Annealed with Low‐Temperature O₂ Plasma