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Photocatalytic inactivation of Escherichia coli bacteria in water using low pressure plasma deposited TiO2 cellulose fabric.
De Vietro, Nicoletta; Tursi, Antonio; Beneduci, Amerigo; Chidichimo, Francesco; Milella, Antonella; Fracassi, Francesco; Chatzisymeon, Efthalia; Chidichimo, Giuseppe.
Afiliação
  • De Vietro N; Institute of Nanotechnology (Nanotec), National Research Council (CNR), c/o Department of Chemistry, University of Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy.
  • Tursi A; Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 15D, 87036 Arcavacata di Rende (Cs), Italy. antonio.tursi@unical.it and School of Engineering, Institute for Infrastructure and Environment, University of Edinburgh, The King's Buildings, Edinburgh EH9 3JL,
  • Beneduci A; Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 15D, 87036 Arcavacata di Rende (Cs), Italy. antonio.tursi@unical.it.
  • Chidichimo F; Department of Environmental and Chemical Engineering, University of Calabria, Via P. Bucci, Cubo 41B, 87036 Arcavacata di Rende (CS), Italy.
  • Milella A; Department of Chemistry, University of Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy.
  • Fracassi F; Department of Chemistry, University of Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy.
  • Chatzisymeon E; School of Engineering, Institute for Infrastructure and Environment, University of Edinburgh, The King's Buildings, Edinburgh EH9 3JL, UK.
  • Chidichimo G; Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 15D, 87036 Arcavacata di Rende (Cs), Italy. antonio.tursi@unical.it.
Photochem Photobiol Sci ; 18(9): 2248-2258, 2019 Sep 01.
Article em En | MEDLINE | ID: mdl-31044191
ABSTRACT
Fabrics obtained from cellulose spinning, extracted from Spanish broom, were coated with TiO2 film, through the low pressure plasma sputtering technique, in order to get antibacterial activity. The obtained fabrics were used for the photocatalytic degradation of Escherichia coli, by irradiation with UV-light emitting diodes (UV-LED), in a batch photocatalytic reactor. Before and after functionalization treatments, cellulosic substrates were chemically characterized by X-ray photoelectron spectroscopy (XPS) analyses. Water Contact Angle (WCA) measurements allowed obtaining information about the hydrophilicity of the materials, while their antibacterial efficiency was determined at several initial concentrations (from 103 up to 108 CFU mL-1) of bacteria in distilled water, bottled water and synthetic wastewater. It was found that photocatalytic reactions were capable of achieving up to 100% bacterial inactivation in 1 h of treatment, following a pseudo-first order kinetic model. No bacterial regrowth was observed after photocatalytic treatments in almost all experimental conditions. In contrast, during photolytic treatment (i.e. in the absence of the TiO2 coated fabrics) bacteria recovered their initial concentration after 3 h in the dark. Finally, the reusability of the plasma modified fibers to inactivate bacteria was studied.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Titânio / Água / Celulose / Escherichia coli / Processos Fotoquímicos / Gases em Plasma / Antibacterianos Idioma: En Ano de publicação: 2019 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Titânio / Água / Celulose / Escherichia coli / Processos Fotoquímicos / Gases em Plasma / Antibacterianos Idioma: En Ano de publicação: 2019 Tipo de documento: Article