Photoelectrocatalytic degradation of pharmaceuticals and inactivation of viruses in water with tungsten oxide electrodes

Alvaro Tolosana; Natalia Pichel; Helen Lubarsky; John Byrne; A P Fernandez-Ibanez

doi:10.1016/j.jece.2022.107955

Photoelectrocatalytic degradation of pharmaceuticals and inactivation of viruses in water with tungsten oxide electrodes

Alvaro Tolosana, Natalia Pichel, Helen Lubarsky, John Byrne, A P Fernandez-Ibanez

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Abstract

Electrochemically assisted photocatalysis (EAP) is one approach to overcome the fast recombination rates in photocatalysis and increase the quantum efficiency to produce ROS. In comparison to TiO2, tungsten trioxide (WO3) can utilize UV and visible photons and with EAP the external bias can be used to drive the reduction pathway. In this work WO3 electrodes were prepared hydrothermally on FTO. Vertically grown WO3 nanoplate-like structures were thoroughly characterized. The WO3 photoanodes improved photocurrent response compared to P25 and a visible response was measured. These results were attributed to smaller charge transfer resistance and their morphology. The activity of the photoanodes was assessed on the EAP degradation of sulfamethoxazole and MS2 bacteriophage. WO3 yielded ten times higher degradation rates for sulfamethoxazole (2.21 · 10−6 mmol cm−2 min−1) compared to P25. WO3 also yielded the fastest MS2 inactivation rate. A rapid 5-log removal was achieved in 6 min with WO3 that maintained activity over 5 cycles.

Original language	English
Article number	107955
Number of pages	12
Journal	Journal of Environmental Chemical Engineering
Volume	10
Issue number	3
Early online date	24 May 2022
DOIs	https://doi.org/10.1016/j.jece.2022.107955
Publication status	Published (in print/issue) - 30 Jun 2022

Bibliographical note

The authors wish to thank the EU-India H2020 cooperation program for funding this work under the PANIWATER Project (RIA GA-820718) and GCRF UKRI for funding SAFEWATER (EP/P032427/1).

Keywords

Photoelectrocatalysis
Contaminant of emerging concern
Bacteriophage
WO3
Photoanode
Water disinfection

UN SDGs

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

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10.1016/j.jece.2022.107955

1-s2.0-S2213343722008284-mainFinal published version, 2.54 MBLicence: CC BY-NC-ND

Cite this

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title = "Photoelectrocatalytic degradation of pharmaceuticals and inactivation of viruses in water with tungsten oxide electrodes",

abstract = "Electrochemically assisted photocatalysis (EAP) is one approach to overcome the fast recombination rates in photocatalysis and increase the quantum efficiency to produce ROS. In comparison to TiO2, tungsten trioxide (WO3) can utilize UV and visible photons and with EAP the external bias can be used to drive the reduction pathway. In this work WO3 electrodes were prepared hydrothermally on FTO. Vertically grown WO3 nanoplate-like structures were thoroughly characterized. The WO3 photoanodes improved photocurrent response compared to P25 and a visible response was measured. These results were attributed to smaller charge transfer resistance and their morphology. The activity of the photoanodes was assessed on the EAP degradation of sulfamethoxazole and MS2 bacteriophage. WO3 yielded ten times higher degradation rates for sulfamethoxazole (2.21 · 10−6 mmol cm−2 min−1) compared to P25. WO3 also yielded the fastest MS2 inactivation rate. A rapid 5-log removal was achieved in 6 min with WO3 that maintained activity over 5 cycles.",

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author = "Alvaro Tolosana and Natalia Pichel and Helen Lubarsky and John Byrne and Fernandez-Ibanez, {A P}",

note = "The authors wish to thank the EU-India H2020 cooperation program for funding this work under the PANIWATER Project (RIA GA-820718) and GCRF UKRI for funding SAFEWATER (EP/P032427/1).",

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AU - Tolosana, Alvaro

AU - Pichel, Natalia

AU - Lubarsky, Helen

AU - Byrne, John

AU - Fernandez-Ibanez, A P

N1 - The authors wish to thank the EU-India H2020 cooperation program for funding this work under the PANIWATER Project (RIA GA-820718) and GCRF UKRI for funding SAFEWATER (EP/P032427/1).

PY - 2022/6/30

Y1 - 2022/6/30

N2 - Electrochemically assisted photocatalysis (EAP) is one approach to overcome the fast recombination rates in photocatalysis and increase the quantum efficiency to produce ROS. In comparison to TiO2, tungsten trioxide (WO3) can utilize UV and visible photons and with EAP the external bias can be used to drive the reduction pathway. In this work WO3 electrodes were prepared hydrothermally on FTO. Vertically grown WO3 nanoplate-like structures were thoroughly characterized. The WO3 photoanodes improved photocurrent response compared to P25 and a visible response was measured. These results were attributed to smaller charge transfer resistance and their morphology. The activity of the photoanodes was assessed on the EAP degradation of sulfamethoxazole and MS2 bacteriophage. WO3 yielded ten times higher degradation rates for sulfamethoxazole (2.21 · 10−6 mmol cm−2 min−1) compared to P25. WO3 also yielded the fastest MS2 inactivation rate. A rapid 5-log removal was achieved in 6 min with WO3 that maintained activity over 5 cycles.

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Photoelectrocatalytic degradation of pharmaceuticals and inactivation of viruses in water with tungsten oxide electrodes

Abstract

Bibliographical note

Keywords

UN SDGs

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