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Recent progress of applied TiO2 photoelectrocatalysis for the degradation of organic pollutants in wastewaters by Enric Brillas; Sergi Garcia-Segura is a Environmental Science article available to read on EtoBox.

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Photoelectrocatalysis (PEC) is a promising powerful electrochemical advanced oxidation process (EAOP) that combines photocatalysis and electrolysis. Upon light irradiation over a semiconductor photocatalyst, electrons of its valence band are promoted to its conduction band giving rise to positively charged holes. The external bias potential applied to the photoanode extracts the photoexcited electrons toward the cathode of the electrolytic cell. Organics can then be oxidized directly by the holes or with hydroxyl radical formed by their reaction with H 2 O/OH -, and at lesser extent with other reactive oxygen species formed. The extensive study of TiO 2 photoanodic nanomaterials and their applicability in environmental remediation makes necessary a further analysis of the state of the art and the actual understanding of potentials and shortcomings. This paper presents a comprehensive and critical review on the application of PEC with TiO 2 photoanodes to remove organic pollutants from wastewaters from 2017 to May 2022. Fundamentals of this technique with pristine TiO 2 photoanodes are explained, with special emphasis on the understanding of ROS origination mechanisms and the analyt

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Author

Enric Brillas; Sergi Garcia-Segura

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)