Solar photocatalytic disinfection using ink-jet printed composite TiO2/SiO2 thin films on flexible substrate : Applicability to drinking and marine water

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Solar photocatalytic disinfection using ink-jet printed composite TiO2/SiO2 thin films on flexible substrate : Applicability to drinking and marine water. / Levchuk, Irina; Homola, Tomáš; Moreno-Andrés, Javier; Rueda-Márquez, Juan José; Dzik, Petr; Moríñigo, Miguel Ángel; Sillanpää, Mika; Manzano, Manuel A.; Vahala, Riku.

In: Solar Energy, Vol. 191, 01.10.2019, p. 518-529.

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Levchuk, Irina ; Homola, Tomáš ; Moreno-Andrés, Javier ; Rueda-Márquez, Juan José ; Dzik, Petr ; Moríñigo, Miguel Ángel ; Sillanpää, Mika ; Manzano, Manuel A. ; Vahala, Riku. / Solar photocatalytic disinfection using ink-jet printed composite TiO2/SiO2 thin films on flexible substrate : Applicability to drinking and marine water. In: Solar Energy. 2019 ; Vol. 191. pp. 518-529.

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@article{bb36469e16be49bdb9b9fd28719b6976,
title = "Solar photocatalytic disinfection using ink-jet printed composite TiO2/SiO2 thin films on flexible substrate : Applicability to drinking and marine water",
abstract = "Hybrid TiO2/SiO2 thin films deposited by material printing technique on flexible substrates were prepared, characterized and tested for solar photocatalytic disinfection. Effect of surface hydrophilicity/hydrophobicity of printed coatings on photocatalytic disinfection was studied by means of (i) drinking water contaminated with natural consortia of fecal bacteria (gram-negative: Escherichia coli and total coliforms; gram-positive: Enterococci), and (ii) seawater containing pathogenic gram-negative bacteria (Vibrio owensii, Vibrio alfacsensis and Vibrio harveyi). Inactivation of gram-negative bacteria in drinking water with fecal contamination by solar photocatalysis was slightly more efficient than solar disinfection, while for gram-positive bacteria similar efficiency was observed. These results, in combination with observed release of titanium from coatings (detected by means of inductively coupled plasma atomic emission spectrometer), indicate that TiO2/SiO2 needs further improvements for solar photocatalytic disinfection of drinking water. Efficiency of seawater disinfection towards gram-negative Vibrio spp. (Vibrio owensii, Vibrio alfacsensis and Vibrio harveyi) was significantly enhanced when TiO2/SiO2 coatings were used under natural solar light. Moreover, hydrophobic thin films led to faster Vibrio spp. inactivation as compared to hydrophilic ones, which was attributed to higher bacteria adhesion on hydrophobic coatings. However, decrease of photocatalytic activity of hydrophobic TiO2/SiO2 coatings was observed after ten experimental cycles mainly due to deposition of salts on the surface of photocatalyst. Generally, results of this study suggest that autochthonous bacteria such as Vibrio spp. in seawater are significantly more resistant to solar disinfection in comparison with not autochthonous bacteria such as Escherichia coli, total coliforms and Enterococci in contaminated drinking water.",
keywords = "Drinking water, Flexible thin films, Marine water, Solar photocatalysis",
author = "Irina Levchuk and Tom{\'a}š Homola and Javier Moreno-Andr{\'e}s and Rueda-M{\'a}rquez, {Juan Jos{\'e}} and Petr Dzik and Mor{\'i}{\~n}igo, {Miguel {\'A}ngel} and Mika Sillanp{\"a}{\"a} and Manzano, {Manuel A.} and Riku Vahala",
year = "2019",
month = "10",
day = "1",
doi = "10.1016/j.solener.2019.09.038",
language = "English",
volume = "191",
pages = "518--529",
journal = "Solar Energy",
issn = "0038-092X",

}

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TY - JOUR

T1 - Solar photocatalytic disinfection using ink-jet printed composite TiO2/SiO2 thin films on flexible substrate : Applicability to drinking and marine water

AU - Levchuk, Irina

AU - Homola, Tomáš

AU - Moreno-Andrés, Javier

AU - Rueda-Márquez, Juan José

AU - Dzik, Petr

AU - Moríñigo, Miguel Ángel

AU - Sillanpää, Mika

AU - Manzano, Manuel A.

AU - Vahala, Riku

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Hybrid TiO2/SiO2 thin films deposited by material printing technique on flexible substrates were prepared, characterized and tested for solar photocatalytic disinfection. Effect of surface hydrophilicity/hydrophobicity of printed coatings on photocatalytic disinfection was studied by means of (i) drinking water contaminated with natural consortia of fecal bacteria (gram-negative: Escherichia coli and total coliforms; gram-positive: Enterococci), and (ii) seawater containing pathogenic gram-negative bacteria (Vibrio owensii, Vibrio alfacsensis and Vibrio harveyi). Inactivation of gram-negative bacteria in drinking water with fecal contamination by solar photocatalysis was slightly more efficient than solar disinfection, while for gram-positive bacteria similar efficiency was observed. These results, in combination with observed release of titanium from coatings (detected by means of inductively coupled plasma atomic emission spectrometer), indicate that TiO2/SiO2 needs further improvements for solar photocatalytic disinfection of drinking water. Efficiency of seawater disinfection towards gram-negative Vibrio spp. (Vibrio owensii, Vibrio alfacsensis and Vibrio harveyi) was significantly enhanced when TiO2/SiO2 coatings were used under natural solar light. Moreover, hydrophobic thin films led to faster Vibrio spp. inactivation as compared to hydrophilic ones, which was attributed to higher bacteria adhesion on hydrophobic coatings. However, decrease of photocatalytic activity of hydrophobic TiO2/SiO2 coatings was observed after ten experimental cycles mainly due to deposition of salts on the surface of photocatalyst. Generally, results of this study suggest that autochthonous bacteria such as Vibrio spp. in seawater are significantly more resistant to solar disinfection in comparison with not autochthonous bacteria such as Escherichia coli, total coliforms and Enterococci in contaminated drinking water.

AB - Hybrid TiO2/SiO2 thin films deposited by material printing technique on flexible substrates were prepared, characterized and tested for solar photocatalytic disinfection. Effect of surface hydrophilicity/hydrophobicity of printed coatings on photocatalytic disinfection was studied by means of (i) drinking water contaminated with natural consortia of fecal bacteria (gram-negative: Escherichia coli and total coliforms; gram-positive: Enterococci), and (ii) seawater containing pathogenic gram-negative bacteria (Vibrio owensii, Vibrio alfacsensis and Vibrio harveyi). Inactivation of gram-negative bacteria in drinking water with fecal contamination by solar photocatalysis was slightly more efficient than solar disinfection, while for gram-positive bacteria similar efficiency was observed. These results, in combination with observed release of titanium from coatings (detected by means of inductively coupled plasma atomic emission spectrometer), indicate that TiO2/SiO2 needs further improvements for solar photocatalytic disinfection of drinking water. Efficiency of seawater disinfection towards gram-negative Vibrio spp. (Vibrio owensii, Vibrio alfacsensis and Vibrio harveyi) was significantly enhanced when TiO2/SiO2 coatings were used under natural solar light. Moreover, hydrophobic thin films led to faster Vibrio spp. inactivation as compared to hydrophilic ones, which was attributed to higher bacteria adhesion on hydrophobic coatings. However, decrease of photocatalytic activity of hydrophobic TiO2/SiO2 coatings was observed after ten experimental cycles mainly due to deposition of salts on the surface of photocatalyst. Generally, results of this study suggest that autochthonous bacteria such as Vibrio spp. in seawater are significantly more resistant to solar disinfection in comparison with not autochthonous bacteria such as Escherichia coli, total coliforms and Enterococci in contaminated drinking water.

KW - Drinking water

KW - Flexible thin films

KW - Marine water

KW - Solar photocatalysis

UR - http://www.scopus.com/inward/record.url?scp=85072162419&partnerID=8YFLogxK

U2 - 10.1016/j.solener.2019.09.038

DO - 10.1016/j.solener.2019.09.038

M3 - Article

VL - 191

SP - 518

EP - 529

JO - Solar Energy

JF - Solar Energy

SN - 0038-092X

ER -

ID: 37046221