Bactericidal activity under UV and visible light of cotton fabrics coated with anthraquinone-sensitized TiO2

Handle URI:
http://hdl.handle.net/10754/562791
Title:
Bactericidal activity under UV and visible light of cotton fabrics coated with anthraquinone-sensitized TiO2
Authors:
Rahal, Raed; Le Béchec, Mickaël; Guyoneaud, Rémy; Pigot, Thierry; Paolacci, H.; Lacombe, Sylvie M.
Abstract:
This study describes a method derived from ISO/TC 206/SC specifications to assess the bactericidal activity against a bacterial strain, Pseudomonas fluorescens, of various photocatalytic fabrics, under UVA and filtered visible light. The experimental method allowed the accurate quantification of bacteria survival on photoactive surfaces and films under UVA and UV-free visible irradiation. Cotton fabrics coated with TiO2, anthraquinone or anthraquinone-sensitized TiO2 display a significant bactericidal efficiency. TiO2-coated fabrics are very efficient against P. fluorescens after 4 h UVA irradiation (bacteria survival below the detection limit). Under UVA-free visible light, anthraquinone-sensitized TiO2 coated fabrics induced a significant bactericidal activity after 2 h irradiation, while anthraquinone alone-coated fabrics were not as efficient and TiO2 coated fabrics were almost inefficient. These results show that although exhibiting a weak n-π* band in the 350-420 nm range, anthraquinone is a good candidate as an efficient visible light photosensitizer. A synergy effect between anthraquinone and TiO2 was demonstrated. A possible reaction mechanism, involving a synergy effect for singlet oxygen formation with anthraquinone-sensitized TiO2 is proposed to account for these results. © 2012 Elsevier B.V. All rights reserved.
KAUST Department:
KAUST Catalysis Center (KCC)
Publisher:
Elsevier BV
Journal:
Catalysis Today
Issue Date:
Jun-2013
DOI:
10.1016/j.cattod.2012.10.012
Type:
Article
ISSN:
09205861
Appears in Collections:
Articles; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorRahal, Raeden
dc.contributor.authorLe Béchec, Mickaëlen
dc.contributor.authorGuyoneaud, Rémyen
dc.contributor.authorPigot, Thierryen
dc.contributor.authorPaolacci, H.en
dc.contributor.authorLacombe, Sylvie M.en
dc.date.accessioned2015-08-03T11:05:53Zen
dc.date.available2015-08-03T11:05:53Zen
dc.date.issued2013-06en
dc.identifier.issn09205861en
dc.identifier.doi10.1016/j.cattod.2012.10.012en
dc.identifier.urihttp://hdl.handle.net/10754/562791en
dc.description.abstractThis study describes a method derived from ISO/TC 206/SC specifications to assess the bactericidal activity against a bacterial strain, Pseudomonas fluorescens, of various photocatalytic fabrics, under UVA and filtered visible light. The experimental method allowed the accurate quantification of bacteria survival on photoactive surfaces and films under UVA and UV-free visible irradiation. Cotton fabrics coated with TiO2, anthraquinone or anthraquinone-sensitized TiO2 display a significant bactericidal efficiency. TiO2-coated fabrics are very efficient against P. fluorescens after 4 h UVA irradiation (bacteria survival below the detection limit). Under UVA-free visible light, anthraquinone-sensitized TiO2 coated fabrics induced a significant bactericidal activity after 2 h irradiation, while anthraquinone alone-coated fabrics were not as efficient and TiO2 coated fabrics were almost inefficient. These results show that although exhibiting a weak n-π* band in the 350-420 nm range, anthraquinone is a good candidate as an efficient visible light photosensitizer. A synergy effect between anthraquinone and TiO2 was demonstrated. A possible reaction mechanism, involving a synergy effect for singlet oxygen formation with anthraquinone-sensitized TiO2 is proposed to account for these results. © 2012 Elsevier B.V. All rights reserved.en
dc.publisherElsevier BVen
dc.subjectAnthraquinoneen
dc.subjectBactericidal fabricsen
dc.subjectDye-sensitized TiO2en
dc.subjectPhotocatalysisen
dc.subjectUVAen
dc.subjectVisible lighten
dc.titleBactericidal activity under UV and visible light of cotton fabrics coated with anthraquinone-sensitized TiO2en
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalCatalysis Todayen
dc.contributor.institutionUniv Pau & Pays Adour, IPREM, UMR CNRS 5254, F-64053 Pau 09, Franceen
kaust.authorRahal, Raeden
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