Inactivation of Escherichia coli by titanium dioxide photocatalytic oxidation

Ireland, John C.; Klostermann, Petra; Rice, Eugene W.; Clark, Robert M.

doi:10.1128/aem.59.5.1668-1670.1993

Cited by 416 publications

(194 citation statements)

References 19 publications

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“…Most studies show that ROS are responsible for the killing, and various authors propose that ⋅OH are responsible (Ireland et al 1993;Kikuchi et al 1997;Maness et al 1999;Salih 2002;Cho et al 2004Cho et al , 2005Cho and Yoon 2008). Lipid peroxidation by ROS was demonstrated by the release of MDA as a breakdown product, and there was a concurrent loss of membrane respiratory activity measured by reduction of 2,3,5-triphenyltetrazolium chloride .…”

Section: Role Of Ros In the Killing Mechanismmentioning

confidence: 99%

Photocatalytic disinfection using titanium dioxide: spectrum and mechanism of antimicrobial activity

Foster

Ditta

Varghese

et al. 2011

Appl Microbiol Biotechnol

972

669

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The photocatalytic properties of titanium dioxide are well known and have many applications including the removal of organic contaminants and production of self-cleaning glass. There is an increasing interest in the application of the photocatalytic properties of TiO(2) for disinfection of surfaces, air and water. Reviews of the applications of photocatalysis in disinfection (Gamage and Zhang 2010; Chong et al., Wat Res 44(10):2997-3027, 2010) and of modelling of TiO(2) action have recently been published (Dalrymple et al. , Appl Catal B 98(1-2):27-38, 2010). In this review, we give an overview of the effects of photoactivated TiO(2) on microorganisms. The activity has been shown to be capable of killing a wide range of Gram-negative and Gram-positive bacteria, filamentous and unicellular fungi, algae, protozoa, mammalian viruses and bacteriophage. Resting stages, particularly bacterial endospores, fungal spores and protozoan cysts, are generally more resistant than the vegetative forms, possibly due to the increased cell wall thickness. The killing mechanism involves degradation of the cell wall and cytoplasmic membrane due to the production of reactive oxygen species such as hydroxyl radicals and hydrogen peroxide. This initially leads to leakage of cellular contents then cell lysis and may be followed by complete mineralisation of the organism. Killing is most efficient when there is close contact between the organisms and the TiO(2) catalyst. The killing activity is enhanced by the presence of other antimicrobial agents such as Cu and Ag.

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Section: Role Of Ros In the Killing Mechanismmentioning

confidence: 99%

Photocatalytic disinfection using titanium dioxide: spectrum and mechanism of antimicrobial activity

Foster

Ditta

Varghese

et al. 2011

Appl Microbiol Biotechnol

972

669

View full text Add to dashboard Cite

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“…Titanium dioxide (TiO 2 ) is an attractive material for the reduction of viral and bacterial infection ratios. TiO 2 undergoes strong oxidization under ultraviolet (UV) irradiation, [8] which can inactivate bacteria and viruses [9][10][11][12][13][14][15][16]. Photocatalysis using TiO 2 is effective in the elimination of toxic substances in water and air [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic activity of Cu2+/TiO2-coated cordierite foam inactivates bacteriophages and Legionella pneumophila

Ishiguro

Yao

Nakano

et al. 2013

Applied Catalysis B: Environmental

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a b s t r a c tWe investigated the antiviral activity of TiO 2 -coated cordierite foam used in air cleaners, as well as the evaluation methodology. Furthermore, we developed Cu 2+ /TiO 2 -coated cordierite foam and investigated the reduction in viral infection ratio. The method for evaluation of antibacterial activity of TiO 2 -coated cordierite foam could also be applied to evaluation of antiviral activity. We showed that Cu 2+ /TiO 2 -coated cordierite foam reduced the viral infection ratio to a greater extent than TiO 2 -coated cordierite foam. Our findings suggest that the infection risk by polluted air could be decreased using Cu 2+ /TiO 2 -coated cordierite foam in air cleaners.

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“…It has been confirmed that these active-oxygen species can destroy the outer membrane of the Escherichia coli cell, finally leading to cell death. [3][4][5][6] Numerous reports have also described this photocatalytic bactericidal effect on other types of bacteria. [7][8][9][10] The clinical success of oral implants has been improved by surface alterations that enhance direct bone-implant contact.…”

mentioning

confidence: 95%

An Antibacterial Surface on Dental Implants, Based on the Photocatalytic Bactericidal Effect

Suketa

Saeki

Kitaura

et al. 2005

Clin Implant Dent Rel Res

102

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Inactivation of Escherichia coli by titanium dioxide photocatalytic oxidation

Cited by 416 publications

References 19 publications

Photocatalytic disinfection using titanium dioxide: spectrum and mechanism of antimicrobial activity

Photocatalytic disinfection using titanium dioxide: spectrum and mechanism of antimicrobial activity

Photocatalytic activity of Cu2+/TiO2-coated cordierite foam inactivates bacteriophages and Legionella pneumophila

An Antibacterial Surface on Dental Implants, Based on the Photocatalytic Bactericidal Effect

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