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Photoelectrochemical Sensing of Hydrogen Peroxide on Hematite
Author(s) -
Saada Hiba,
Abdallah Rawa,
Bergamini JeanFrançois,
Fryars Stéphanie,
Dorcet Vincent,
Joanny Loic,
Gouttefangeas Francis,
Ollivier Sophie,
Loget Gabriel
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202000028
Subject(s) - hematite , hydrogen peroxide , reusability , semiconductor , materials science , nanotechnology , optoelectronics , chemical engineering , chemistry , mineralogy , computer science , organic chemistry , software , engineering , programming language
Due to its abundance and chemical stability, hematite (α‐Fe 2 O 3 ) is a promising n ‐type semiconductor photoelectrode. This is particularly true in the frame of the rapidly developing area of photoelectrochemical (PEC) sensing, where the short excited‐state lifetime and the small carrier diffusion length of hematite can be beneficially employed. On the other hand, H 2 O 2 is an essential molecule for biological, environmental and industrial applications. In this article, we report a simple method to prepare photoelectroactive hematite layers on fluorine‐doped SnO 2 (FTO) and we use these surfaces for H 2 O 2 PEC sensing. The so‐created sensors allow to reliably detect H 2 O 2 down to a sub‐μM concentration with a large linear range and a good reusability.