Bolatov, A., Manjovelo, A., Chouchene, B., Balan, L., Gries, T., Medjahdi, G., Uralbekov, B., & Schneider, R. (2024). Ternary ZnS/ZnO/Graphitic Carbon Nitride Heterojunction for Efficient and Stable Hydrogen Photocatalytic Production. Preprints. https://doi.org/10.20944/preprints202409.0553.v1
Chicago/Turabian Style
Bolatov, A., Bolat Uralbekov and Raphaël Schneider. 2024 "Ternary ZnS/ZnO/Graphitic Carbon Nitride Heterojunction for Efficient and Stable Hydrogen Photocatalytic Production" Preprints. https://doi.org/10.20944/preprints202409.0553.v1
Abstract
Ternary ZnS/ZnO/graphitic carbon nitride (gCN) photocatalysts were prepared by coupling gCN sheets with ZnO nanorods under solvothermal conditions followed by sulfurization using Na2S. SEM and TEM analyses show that small-sized ZnS particles (ca. 7.2 nm) deposit homo-geneously on the surface of ZnO/gCN nanohybrids. Photoluminescence and electrochemical impedance spectroscopy show that ZnS allows an enhanced charge separation efficiency as well as prolonged lifetime of photogenerated charge carriers, leading to improved hydrogen photo-production 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 produc-tion. A double Z-scheme mechanism is proposed for hydrogen photoproduction using the ZnS/ZnO/gCN heterojunction.
Chemistry and Materials Science, Chemical Engineering
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