Publication
847
J. Photochem. Photobiol. A, 356, 489-501, 2018
DOI:10.1016/j.jphotochem.2018.01.038
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Photoelectrochemical properties of ZnS- and CdS-TiO2 nanostructured photocatalysts: Aqueous sulfidation as a smart route to improve catalyst stability
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Samiha Chaguetmi, Larissa Chaperman, Sophie Nowak, Delphine Schaming, Stephanie Lau-Truong, Philippe Decorse, Patricia Beaunier, Cyrille Costentin, Fayna Mammeri, Slimane Achour, and Souad Ammar
Faculté des Sciences, Université 20 Août 1955 de Skikda, 21000 Skikda, Algeria
Interfaces Traitement Organisation et DYnamique des Systèmes (ITODYS), Université Paris Diderot, Sorbonne Paris Cité, CNRS UMR-7086, 75205 Paris, France
Laboratoire de Réactivité des Surfaces (LRS), Université Pierre & Marie Curie, Sorbonne Université, CNRS UMR-7197, 75005 Paris, France
Laboratoire d’Electrochimie Moléculaire (LEM), Université Paris Diderot, Sorbonne Paris Cité, CNRS UMR-7591, 75205 Paris, France
Ecole Nationale Polytechnique de Constantine, Université de Constantine 1, 25000 Constantine, Algeria
ZnS- and CdS-TiO2 hetero-nanostructures were synthesized by impregnation of polyol-made ZnS, CdS quantum dots (QDs) on the surface of TiO2 nanofibers that were grown on Ti sheets by controlled corrosion. Due to their finite size, the grafted QDs were partly oxidized, when air exposed, reducing their ability to sensitize TiO2 toward photoelectrochemical (PEC) water splitting application. We showed that a subsequent aqueous sulfidation allowed recovering the initial chemical composition of the produced catalysts improving their chemical stability and consequently their PEC properties. |
