TY - JOUR
T1 - UVA and solar driven photocatalysis with rGO/TiO2/polysiloxane for inactivation of pathogens in recirculation aquaculture systems (RAS) streams
AU - Levchuk, Irina
AU - Homola, Tomáš
AU - Singhal, Gaurav
AU - Rueda-Márquez, Juan José
AU - Vida, Július
AU - Souček, Pavel
AU - Svoboda, Tomáš
AU - Villar-Navarro, Elena
AU - Levchuk, Olga
AU - Dzik, Petr
AU - Lähde, Anna
AU - Moreno-Andrés, Javier
N1 - Authors would like to thank Jouni Vielma from Natural Resources Institute Finland for providing RAS water and M. Shekargoftar from Masaryk University for SEM measurements. Authors express their gratitude to Arūnas Meščeriakovas from University of Eastern Finland for TEM measurements. Authors are grateful for UEF Water joint funding from Saastamoinen foundation, Olvi foundation and Wihuri foundation. This research was supported by GACR project 19–14770Y funded by Czech Science Foundation and project LM2018097, funded by the Ministry of Education, Youth and Sports of the Czech Republic. J. J. Rueda Marquez would like to thank Academy of Finland (N°322339, 2019 - 2022) and Tekniikan Edistämissäätiö (TES Foundation, Finland, grant number 6120). J. Moreno-Andrés is grateful for the financial support by the European Union under the 2014–2020 ERDF Operational Programme and by the Department of Economy, Knowledge, Business and University of the Regional Government of Andalusia. Project reference: FEDER-UCA18–108023 and Grant IJC2020–042741-I funded by MCIN/AEI/ 10.13039/501100011033 and by European Union NextGenerationEU/PRTR.
PY - 2022/5/15
Y1 - 2022/5/15
N2 - In this study TiO2/polysiloxane(SiBi) thin films modified with different concentrations of graphene oxide (GO) were prepared by ink-jet printing on flexible polyethylene terephthalate (PET) substrates. Prepared coatings were characterized by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), Raman and water contact angle measurements. During photocatalytic tests strong change of color of prepared coatings modified with GO was observed. XPS analysis of thin films after photocatalytic tests suggests that reduction of GO took place. Prepared coatings were studied for inactivation of microorganisms naturally occurring in aquaculture water under UVA and natural solar irradiation. Effect of rGO concentration in prepared coating on inactivation of target bacteria Aeromonas hydrophila and Citrobacter gillenii was evaluated under UVA irradiation. Aeromonas hydrophila was more sensitive to photocatalytic inactivation in comparison with Citrobacter gillenii. Higher photocatalytic inactivation of target microorganisms was attributed to thin films with concentration of rGO 1 and 5%. The rGO/TiO2/SiBi 5% were further tested for inactivation of Aeromonas salmocida, Serratia fonticola strain and Lactococcus lactis strain under natural solar light. Solar photocatalysis slightly enhanced inactivation of Aeromonas salmocida and Serratia fonticola strain, while opposite was observed for Lactococcus lactis strain.
AB - In this study TiO2/polysiloxane(SiBi) thin films modified with different concentrations of graphene oxide (GO) were prepared by ink-jet printing on flexible polyethylene terephthalate (PET) substrates. Prepared coatings were characterized by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), Raman and water contact angle measurements. During photocatalytic tests strong change of color of prepared coatings modified with GO was observed. XPS analysis of thin films after photocatalytic tests suggests that reduction of GO took place. Prepared coatings were studied for inactivation of microorganisms naturally occurring in aquaculture water under UVA and natural solar irradiation. Effect of rGO concentration in prepared coating on inactivation of target bacteria Aeromonas hydrophila and Citrobacter gillenii was evaluated under UVA irradiation. Aeromonas hydrophila was more sensitive to photocatalytic inactivation in comparison with Citrobacter gillenii. Higher photocatalytic inactivation of target microorganisms was attributed to thin films with concentration of rGO 1 and 5%. The rGO/TiO2/SiBi 5% were further tested for inactivation of Aeromonas salmocida, Serratia fonticola strain and Lactococcus lactis strain under natural solar light. Solar photocatalysis slightly enhanced inactivation of Aeromonas salmocida and Serratia fonticola strain, while opposite was observed for Lactococcus lactis strain.
KW - Aquaculture water
KW - Bacteria inactivation
KW - Flexible thin films
KW - Photocatalysis
UR - http://www.scopus.com/inward/record.url?scp=85126080921&partnerID=8YFLogxK
U2 - 10.1016/j.ceja.2022.100243
DO - 10.1016/j.ceja.2022.100243
M3 - Article
AN - SCOPUS:85126080921
SN - 2666-8211
VL - 10
JO - Chemical Engineering Journal Advances
JF - Chemical Engineering Journal Advances
M1 - 100243
ER -
