Efficient visible-light-driven alcohol oxidation coupled hydrogen production on 0D/0D “n-NiWO4/p-CdS” S-scheme heterojunction
The theory of S-scheme transfer mechanism have significant implications for exploring the mechanism of photocatalytic carrier migration and its intrinsic dynamics. Modeled NiWO4/CdS heterojunction photocatalyst (referred to as NWO/CS) was synthesized using a simple hydrothermal method and applied fo...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-07-01
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| Series: | Journal of Materiomics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352847824002363 |
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| Summary: | The theory of S-scheme transfer mechanism have significant implications for exploring the mechanism of photocatalytic carrier migration and its intrinsic dynamics. Modeled NiWO4/CdS heterojunction photocatalyst (referred to as NWO/CS) was synthesized using a simple hydrothermal method and applied for alcohol oxidation coupled with H2 production. Systematically investigates the factors contributing to its enhanced performance and the internal charge transfer mechanisms. The 28% NWO/CS composite exhibited the highest activity, with a H2 production and the aldehyde generation rates of 16.08 mmol⋅g−1⋅h−1 and 16.88 mmol⋅g−1⋅h−1, which are about 320 times higher than those of NiWO4 (0.05 mmol⋅g−1⋅h−1 and 0.06 mmol⋅g−1⋅h−1) and 16 times higher than that of CdS (1.09 mmol⋅g−1⋅h−1 and 1.12 mmol⋅g−1⋅h−1). Based on the in-situ XPS, transient surface photovoltage, theoretical calculations, and other physicochemical characterization results, we have confirmed that the built-in electric field formed at the interface and the transfer of photogenerated charges follows the S-scheme mechanism between relative “n-NiWO4” and relative “p-CdS” are the key factors that promote efficient charge separation and significantly enhance the subsequent reaction activity. This work provides a theoretical basis for improving photocatalytic performance and understanding photocatalytic mechanisms. |
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| ISSN: | 2352-8478 |