Inactivation of Escherichia coli on anatase and rutile nanoparticles using UV and fluorescent light

Journal Article · Sat Jun 01 00:00:00 EDT 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2013.02.024· OSTI ID:22341674

Caratto, V. ^[1]; Aliakbarian, B.; Casazza, A. A. ^[2]; Bernini, C. ^[3]; Perego, P. ^[2]; Ferretti, M. ^[1]

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1. Dipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, 16146 Genova (Italy)
2. Department of Chemical and Process Engineering G.B. Bonino, University of Genoa, Via Opera Pia 15, 16145 Genova (Italy)
3. CNR-SPIN, Corso Perrone 24, 16156 Genova (Italy)

Highlights: ► Photocatalytic deactivation of Escherichia coli in presence of TiO{sub 2} nanoparticles ► The presence of catalyst is less important when the radiation is in the UV range ► Rutile has an higher efficiency respect to anatase under visible light. - Abstract: The photocatalytic deactivation of Escherichia coli HB101 by two different structures of TiO{sub 2}, rutile and anatase (used separately and in a 1:1 mixture), was examined. The microorganism was deposited on a filter membrane containing 520 mg/m{sup 2} of TiO{sub 2} and then irradiated by a neon lamp. In order to study the rate of deactivation of the microorganism we studied four different exposure times: 20, 40, 60 and 90 min. The results showed that rutile has an antimicrobial activity higher than anatase, while the mixture had values near to the average between them in every condition. The highest difference in the inactivation capacity of the two structures is observable at shorter times. The effect of the different crystal phases was evaluated by Scanning Electron Microscopy.

• OSTI ID: 22341674
• Journal Information: Materials Research Bulletin, Vol. 48, Issue 6; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
60 APPLIED LIFE SCIENCES
CATALYSTS
CRYSTALS
DEACTIVATION
DEPOSITS
EFFICIENCY
ESCHERICHIA COLI
FLUORESCENCE
INACTIVATION
IRRADIATION
MIXTURES
NANOPARTICLES
NANOSTRUCTURES
PHOTOCATALYSIS
RUTILE
SCANNING ELECTRON MICROSCOPY
TITANIUM OXIDES
X-RAY DIFFRACTION