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Review

A Review of Photoelectrocatalytic Reactors for Water and Wastewater Treatment

Nanotechnology and Integrated Bioengineering Centre, Ulster University, Newtownabbey BT37 0QB, UK
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Authors to whom correspondence should be addressed.
Academic Editor: Efthalia Chatzisymeon
Water 2021, 13(9), 1198; https://doi.org/10.3390/w13091198
Received: 29 March 2021 / Revised: 19 April 2021 / Accepted: 22 April 2021 / Published: 26 April 2021
The photoexcitation of suitable semiconducting materials in aqueous environments can lead to the production of reactive oxygen species (ROS). ROS can inactivate microorganisms and degrade a range of chemical compounds. In the case of heterogeneous photocatalysis, semiconducting materials may suffer from fast recombination of electron–hole pairs and require post-treatment to separate the photocatalyst when a suspension system is used. To reduce recombination and improve the rate of degradation, an externally applied electrical bias can be used where the semiconducting material is immobilised onto an electrically conducive support and connected to a counter electrode. These electrochemically assisted photocatalytic systems have been termed “photoelectrocatalytic” (PEC). This review will explain the fundamental mechanism of PECs, photoelectrodes, the different types of PEC reactors reported in the literature, the (photo)electrodes used, the contaminants degraded, the key findings and prospects in the research area. View Full-Text
Keywords: photoelectrocatalytic; electrochemical assisted photocatalysis; PEC reactor; water; wastewater; photoelectrodes; advanced oxidation process photoelectrocatalytic; electrochemical assisted photocatalysis; PEC reactor; water; wastewater; photoelectrodes; advanced oxidation process
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MDPI and ACS Style

McMichael, S.; Fernández-Ibáñez, P.; Byrne, J.A. A Review of Photoelectrocatalytic Reactors for Water and Wastewater Treatment. Water 2021, 13, 1198. https://doi.org/10.3390/w13091198

AMA Style

McMichael S, Fernández-Ibáñez P, Byrne JA. A Review of Photoelectrocatalytic Reactors for Water and Wastewater Treatment. Water. 2021; 13(9):1198. https://doi.org/10.3390/w13091198

Chicago/Turabian Style

McMichael, Stuart, Pilar Fernández-Ibáñez, and John A. Byrne 2021. "A Review of Photoelectrocatalytic Reactors for Water and Wastewater Treatment" Water 13, no. 9: 1198. https://doi.org/10.3390/w13091198

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