Ternary ZnS/ZnO/Graphitic Carbon Nitride Heterojunction for Photocatalytic Hydrogen Production.
Fiche publication
Date publication
octobre 2024
Journal
Materials (Basel, Switzerland)
Auteurs
Membres identifiés du Cancéropôle Est :
Pr SCHNEIDER Raphaël
Tous les auteurs :
Bolatov A, Manjovelo A, Chouchene B, Balan L, Gries T, Medjahdi G, Uralbekov B, Schneider R
Lien Pubmed
Résumé
Ternary ZnS/ZnO/graphitic carbon nitride (gCN) photocatalysts were prepared by coupling gCN sheets with ZnO nanorods under solvothermal conditions followed by sulfurization using NaS. SEM and TEM analyses show that small-sized ZnS particles (ca. 7.2 nm) deposit homogeneously on the surface of ZnO/gCN nanohybrids. Photoluminescence and electrochemical impedance spectroscopy show that ZnS allows for an enhanced charge separation efficiency as well as prolonged lifetime of photogenerated charge carriers, leading to improved hydrogen photoproduction under UV light irradiation compared to ZnO/gCN. Moreover, the deposition of ZnS nanoparticles improves the photostability of the ZnS/ZnO/gCN catalyst for hydrogen production. A double Z-scheme mechanism is proposed for hydrogen photoproduction using the ZnS/ZnO/gCN heterojunction.
Mots clés
ZnS/ZnO/gCN heterojunction, double Z-scheme mechanism, photocatalytic hydrogen evolution
Référence
Materials (Basel). 2024 10 4;17(19):