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Type of publication: research article
Type of publication (PDB): Straipsnis Clarivate Analytics Web of Science / Article in Clarivate Analytics Web of Science (S1)
Field of Science: Energetika ir termoinžinerija / Energetics and thermal engineering (T006)
Author(s): Varnagiris, Šarūnas;Sakalauskaitė, Sandra;Tučkutė, Simona;Lelis, Martynas;Daugelavičius, Rimantas;Milčius, Darius
Title: Investigation of E. coli bacteria inactivation by photocatalytic activity of TiO2 coated expanded polystyrene foam
Is part of: Materials research express. Bristol : IOP Publishing Ltd., 2017, Vol. 4, iss. 3
Extent: p. 1-7
Date: 2017
Note: Article Number: 036409. Funding Agency: European Social Fund; Grant Number: VP1-3.1-SMM-10-V-02-019
Keywords: Coli bacteria;Photocatalytic properties;Polymorphs;Foam;Magnetron sputtering;Bacteria inactivation;Expanded polystyrene;UV;Escherichia coli
Abstract: Photocatalytic properties of anatase and other TiO2 polymorphs are widely researched and applied in practical application. In current study TiO2 films on the plasma pre-treated expanded polystyrene (EPS) foam were deposited using magnetron sputtering technique. Main properties of the films were characterised using combination of XRD, XPS and SEM techniques. Photocatalytic properties of the observed crystalline anatase phase were tested by investigating bleaching of the methylene blue (MB) aqueous solution and by testing Escherichia coli (E. coli) viability after incubation under UV-B irradiation. E. coli viability experiments indicated that there are two mechanisms of E. coli bacteria inactivation. UV irradiation alone causes rapid damage to the outer membrane of E. coli bacteria. The second mechanism of E. coli inactivation is invoked only with synergistic combination of TiO2 and UV. Acting as photocatalyst TiO2 generates active radicals who initiate the chain peroxidation of organic molecules and within 45 min reduce E. coli bacteria viability by nearly 90%
Affiliation(s): Biochemijos katedra
Gamtos mokslų fakultetas
Lietuvos energetikos institutas
Vytauto Didžiojo universitetas
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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