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Author |
Ran, M.-J.; Wang, M.; Hu, Z.-Y.; Huang, Y.-F.; Wang, L.-D.; Wu, L.; Yuan, M.-M.; Zhang, J.; Li, B.; Van Tendeloo, G.; Li, Y.; Su, B.-L. |
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Title |
A hollow core-shell TiO₂ /NiCo₂S₄ Z-Scheme heterojunction photocatalyst for efficient hydrogen evolution |
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A1 Journal article |
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Year  |
2025 |
Publication |
Journal of materials science & technology |
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Volume |
212 |
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Pages |
182-191 |
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Keywords |
A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT) |
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Abstract |
Constructing heterojunctions have received significant attention in photocatalysis because of their efficient separation of photogenerated carriers and improving light utilization efficiency. Bimetallic sulfides (e.g. NiCo2S4) are applied in electrocatalysis and supercapacitors that can be coupled with TiO2 to form a heterojunction. Owing to the staggered energy band arrangement between TiO2 and NiCo2S4, the establishing of a Z-scheme heterojunction between them is expected to enhance the carrier separation efficiency and reduce the sulfide photo-corrosion. However, the application of NiCo2S4 in photocatalysis and studies on the mechanism of the TiO2/NiCo2S4 Z-scheme heterojunction have seldom been reported. In this work, we obtained a hollow core-shell TiO2/NiCo2S4 Z-scheme photocatalyst through a solvothermal method for photocatalytic hydrogen evolution (PHE). The PHE rate of the optimized TiO2/NiCo2S4-0.3 is 8.55 mmol g-1 h-1, approximately 34 times higher than pure TiO2, 94 times higher than pure NiCo2S4. The remarkable photocatalytic activity can be ascribed to the hollow structure and the in-situ constructed Z-scheme heterojunction. The photogenerated charge transfer mechanism is revealed by hydroxyl radical trapping experiments and electron paramagnetic resonance (EPR) characterization. The in-situ construction of the Z-scheme heterojunction not only enhances the efficiency of separating the photogenerated carriers but also reduces the photo-corrosion of NiCo2S4. This study proposes an effective strategy for the design of TiO2-based Z-scheme heterojunctions and the application of NiCo2S4 in photocatalysis. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
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WOS:001270563000001 |
Publication Date |
2024-06-28 |
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ISSN |
1005-0302 |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Open Access |
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Call Number |
UA @ admin @ c:irua:216294 |
Serial |
9405 |
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