Antimicrobial activity of printed composite TiO2/SiO2 and TiO2/SiO2/Au thin films under UVA-LED and natural solar radiation

Irina Levchuk; Marcela Kralova; Juan José Rueda-Márquez; Javier Moreno-Andrés; Sergio Gutiérrez-Alfaro; Petr Dzik; Stephane Parola; Mika Sillanpää; Riku Vahala; Manuel A. Manzano

doi:10.1016/j.apcatb.2018.08.051

Antimicrobial activity of printed composite TiO₂/SiO₂ and TiO₂/SiO₂/Au thin films under UVA-LED and natural solar radiation

Irina Levchuk
, Marcela Kralova
, Juan José Rueda-Márquez
, Javier Moreno-Andrés
, Sergio Gutiérrez-Alfaro
, Petr Dzik
, Stephane Parola
, Mika Sillanpää
, Riku Vahala
, Manuel A. Manzano

Aalto University
University of Cádiz
Brno University of Technology
Lappeenranta University of Technology
École normale supérieure de Lyon

Research output: Contribution to journal › Article › peer-review

51 Citations (Scopus)

Abstract

Composite TiO₂/SiO₂ porous coatings modified with bipyramid-like gold nanoparticles were prepared by means of sol-gel and inkjet printing technique, comprehensively characterized and studied for photocatalytic disinfection of drinking water with fecal contamination by natural bacteria consortia. Photocatalytic antimicrobial activity of prepared thin films was evaluated against gram-negative (Escherichia coli and Total coliforms) and gram-positive bacteria (Enterococci). Elimination rate of all tested bacteria increased when photocatalytic coatings were used in comparison with solar disinfection. The best results in terms of antimicrobial activity were obtained with TiO₂/SiO₂/Au thin films under natural solar radiation, which demonstrated the highest antimicrobial activity, enhancing the inactivation rates of E. coli, Total coliforms and Enterococci 1.5, 1.3 and 1.6 times, respectively as compared to solar disinfection without photocatalyst. Remarkable difference in bacteria sensitivity for photocatalytic disinfection was observed with trend E. coli > Total coliforms > Enterococci. No release of gold and titanium was detected during photocatalytic water disinfection test. Regrowth of E. coli, Total coliforms and Enterococci after photocatalytic bacteria inactivation under UVA-LED and natural solar radiation was lower than 1% (24, 48 and 72 h), indicating potential application of prepared coatings for production of safe drinking water.

Original language	English
Pages (from-to)	609-618
Number of pages	10
Journal	Applied Catalysis B: Environmental
Volume	239
DOIs	https://doi.org/10.1016/j.apcatb.2018.08.051
Publication status	Published - 30 Dec 2018
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation

Keywords

Enterococci
Escherichia coli
Gold bipyramids
Total coliforms
Water disinfection

ASJC Scopus subject areas

Catalysis
General Environmental Science
Process Chemistry and Technology

Access to Document

10.1016/j.apcatb.2018.08.051

Cite this

Levchuk, I., Kralova, M., Rueda-Márquez, J. J., Moreno-Andrés, J., Gutiérrez-Alfaro, S., Dzik, P., Parola, S., Sillanpää, M., Vahala, R., & Manzano, M. A. (2018). Antimicrobial activity of printed composite TiO₂/SiO₂ and TiO₂/SiO₂/Au thin films under UVA-LED and natural solar radiation. Applied Catalysis B: Environmental, 239, 609-618. https://doi.org/10.1016/j.apcatb.2018.08.051

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title = "Antimicrobial activity of printed composite TiO2/SiO2 and TiO2/SiO2/Au thin films under UVA-LED and natural solar radiation",

abstract = "Composite TiO2/SiO2 porous coatings modified with bipyramid-like gold nanoparticles were prepared by means of sol-gel and inkjet printing technique, comprehensively characterized and studied for photocatalytic disinfection of drinking water with fecal contamination by natural bacteria consortia. Photocatalytic antimicrobial activity of prepared thin films was evaluated against gram-negative (Escherichia coli and Total coliforms) and gram-positive bacteria (Enterococci). Elimination rate of all tested bacteria increased when photocatalytic coatings were used in comparison with solar disinfection. The best results in terms of antimicrobial activity were obtained with TiO2/SiO2/Au thin films under natural solar radiation, which demonstrated the highest antimicrobial activity, enhancing the inactivation rates of E. coli, Total coliforms and Enterococci 1.5, 1.3 and 1.6 times, respectively as compared to solar disinfection without photocatalyst. Remarkable difference in bacteria sensitivity for photocatalytic disinfection was observed with trend E. coli > Total coliforms > Enterococci. No release of gold and titanium was detected during photocatalytic water disinfection test. Regrowth of E. coli, Total coliforms and Enterococci after photocatalytic bacteria inactivation under UVA-LED and natural solar radiation was lower than 1\% (24, 48 and 72 h), indicating potential application of prepared coatings for production of safe drinking water.",

keywords = "Enterococci, Escherichia coli, Gold bipyramids, Total coliforms, Water disinfection",

author = "Irina Levchuk and Marcela Kralova and Rueda-M{\'a}rquez, \{Juan Jos{\'e}\} and Javier Moreno-Andr{\'e}s and Sergio Guti{\'e}rrez-Alfaro and Petr Dzik and Stephane Parola and Mika Sillanp{\"a}{\"a} and Riku Vahala and Manzano, \{Manuel A.\}",

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year = "2018",

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doi = "10.1016/j.apcatb.2018.08.051",

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Levchuk, I, Kralova, M, Rueda-Márquez, JJ, Moreno-Andrés, J, Gutiérrez-Alfaro, S, Dzik, P, Parola, S, Sillanpää, M, Vahala, R & Manzano, MA 2018, 'Antimicrobial activity of printed composite TiO₂/SiO₂ and TiO₂/SiO₂/Au thin films under UVA-LED and natural solar radiation', Applied Catalysis B: Environmental, vol. 239, pp. 609-618. https://doi.org/10.1016/j.apcatb.2018.08.051

TY - JOUR

T1 - Antimicrobial activity of printed composite TiO2/SiO2 and TiO2/SiO2/Au thin films under UVA-LED and natural solar radiation

AU - Levchuk, Irina

AU - Kralova, Marcela

AU - Rueda-Márquez, Juan José

AU - Moreno-Andrés, Javier

AU - Gutiérrez-Alfaro, Sergio

AU - Dzik, Petr

AU - Parola, Stephane

AU - Sillanpää, Mika

AU - Vahala, Riku

AU - Manzano, Manuel A.

PY - 2018/12/30

Y1 - 2018/12/30

N2 - Composite TiO2/SiO2 porous coatings modified with bipyramid-like gold nanoparticles were prepared by means of sol-gel and inkjet printing technique, comprehensively characterized and studied for photocatalytic disinfection of drinking water with fecal contamination by natural bacteria consortia. Photocatalytic antimicrobial activity of prepared thin films was evaluated against gram-negative (Escherichia coli and Total coliforms) and gram-positive bacteria (Enterococci). Elimination rate of all tested bacteria increased when photocatalytic coatings were used in comparison with solar disinfection. The best results in terms of antimicrobial activity were obtained with TiO2/SiO2/Au thin films under natural solar radiation, which demonstrated the highest antimicrobial activity, enhancing the inactivation rates of E. coli, Total coliforms and Enterococci 1.5, 1.3 and 1.6 times, respectively as compared to solar disinfection without photocatalyst. Remarkable difference in bacteria sensitivity for photocatalytic disinfection was observed with trend E. coli > Total coliforms > Enterococci. No release of gold and titanium was detected during photocatalytic water disinfection test. Regrowth of E. coli, Total coliforms and Enterococci after photocatalytic bacteria inactivation under UVA-LED and natural solar radiation was lower than 1% (24, 48 and 72 h), indicating potential application of prepared coatings for production of safe drinking water.

AB - Composite TiO2/SiO2 porous coatings modified with bipyramid-like gold nanoparticles were prepared by means of sol-gel and inkjet printing technique, comprehensively characterized and studied for photocatalytic disinfection of drinking water with fecal contamination by natural bacteria consortia. Photocatalytic antimicrobial activity of prepared thin films was evaluated against gram-negative (Escherichia coli and Total coliforms) and gram-positive bacteria (Enterococci). Elimination rate of all tested bacteria increased when photocatalytic coatings were used in comparison with solar disinfection. The best results in terms of antimicrobial activity were obtained with TiO2/SiO2/Au thin films under natural solar radiation, which demonstrated the highest antimicrobial activity, enhancing the inactivation rates of E. coli, Total coliforms and Enterococci 1.5, 1.3 and 1.6 times, respectively as compared to solar disinfection without photocatalyst. Remarkable difference in bacteria sensitivity for photocatalytic disinfection was observed with trend E. coli > Total coliforms > Enterococci. No release of gold and titanium was detected during photocatalytic water disinfection test. Regrowth of E. coli, Total coliforms and Enterococci after photocatalytic bacteria inactivation under UVA-LED and natural solar radiation was lower than 1% (24, 48 and 72 h), indicating potential application of prepared coatings for production of safe drinking water.

KW - Enterococci

KW - Escherichia coli

KW - Gold bipyramids

KW - Total coliforms

KW - Water disinfection

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U2 - 10.1016/j.apcatb.2018.08.051

DO - 10.1016/j.apcatb.2018.08.051

M3 - Article

AN - SCOPUS:85052321727

SN - 0926-3373

VL - 239

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EP - 618

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

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