TY - JOUR
T1 - The pathway towards photoelectrocatalytic water disinfection
T2 - Review and prospects of a powerful sustainable tool
AU - Garcia-Segura, Sergi
AU - Arotiba, Omotayo A.
AU - Brillas, Enric
N1 - Funding Information:
Funding: This work was funded by the National Science Foundation (EEC-1449500) Nanosystems Engineering Research Center on Nanotechnology-Enabled Water Treatment, and The National Research Foundation of South Africa (CPRR 118546).
Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/8
Y1 - 2021/8
N2 - Photoelectrocatalysis is a hybrid photon/electron-driven process that benefits from the synergistic effects of both processes to enhance and stabilize the generation of disinfecting oxidants. Pho-toelectrocatalysis is an easy to operate technology that can be scaled-up or scaled-down for various water treatment applications as low-cost decentralized systems. This review article describes the fundamentals of photoelectrocatalysis, applied to water disinfection to ensure access to clean water for all as a sustainable development goal. Advances in reactor engineering design that integrate light-deliv-ery and electrochemical system requirements are presented, with a description of photo-electrode ma-terial advances, including doping, nano-decoration, and nanostructure control. Disinfection and cell inactivation are described using different model microorganisms such as E. coli, Mycobacteria, Le-gionella, etc., as well the fungus Candida parapsilosis, with relevant figures of merit. The key advances in the elucidation of bacterial inactivation mechanisms by photoelectrocatalytic treatments are presented and knowledge gaps identified. Finally, prospects and further research needs are outlined, to define the pathway towards the future of photoelectrocatalytic disinfection technologies.
AB - Photoelectrocatalysis is a hybrid photon/electron-driven process that benefits from the synergistic effects of both processes to enhance and stabilize the generation of disinfecting oxidants. Pho-toelectrocatalysis is an easy to operate technology that can be scaled-up or scaled-down for various water treatment applications as low-cost decentralized systems. This review article describes the fundamentals of photoelectrocatalysis, applied to water disinfection to ensure access to clean water for all as a sustainable development goal. Advances in reactor engineering design that integrate light-deliv-ery and electrochemical system requirements are presented, with a description of photo-electrode ma-terial advances, including doping, nano-decoration, and nanostructure control. Disinfection and cell inactivation are described using different model microorganisms such as E. coli, Mycobacteria, Le-gionella, etc., as well the fungus Candida parapsilosis, with relevant figures of merit. The key advances in the elucidation of bacterial inactivation mechanisms by photoelectrocatalytic treatments are presented and knowledge gaps identified. Finally, prospects and further research needs are outlined, to define the pathway towards the future of photoelectrocatalytic disinfection technologies.
KW - Candida parapsilosis
KW - Decentralized disinfection
KW - Drinking water treatment
KW - Electrochemical advanced oxidation process
KW - Escherichia coli
KW - Mycobacteria
KW - Photoca-talyisis
KW - Photoelectrocatalysis
KW - TiO2
KW - UV light and sunlight
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U2 - 10.3390/catal11080921
DO - 10.3390/catal11080921
M3 - Review article
AN - SCOPUS:85111320737
SN - 2073-4344
VL - 11
JO - Catalysts
JF - Catalysts
IS - 8
M1 - 921
ER -