Green and regulable synthesis of CdNCN on CdS semiconductor: Atomic-level heterostructures for enhanced photocatalytic hydrogen evolution
In the realm of photoenergy conversion, the scarcity of efficient light-driven semiconductors poses a significant obstacle to the advancement of photocatalysis, highlighting the critical need for researchers to explore novel semiconductor materials. Herein, we present the inaugural synthesis of a no...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co. Ltd.
2024-12-01
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| Series: | Advanced Powder Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772834X24000733 |
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| Summary: | In the realm of photoenergy conversion, the scarcity of efficient light-driven semiconductors poses a significant obstacle to the advancement of photocatalysis, highlighting the critical need for researchers to explore novel semiconductor materials. Herein, we present the inaugural synthesis of a novel semiconductor, CdNCN, under mild conditions, while shedding light on its formation mechanism. By effectively harnessing the [NCN]2⁻ moiety in the thiourea process, we successfully achieve the one-pot synthesis of CdNCN-CdS heterostructure photocatalysts. Notably, the optimal CdNCN-CdS sample demonstrates a hydrogen evolution rate of 14.7 mmol g−1 h−1 under visible light irradiation, establishing itself as the most efficient catalyst among all reported CdS-based composites without any cocatalysts. This outstanding hydrogen evolution performance of CdNCN-CdS primarily arises from two key factors: i) the establishment of an atomic-level N-Cd-S heterostructure at the interface between CdNCN and CdS, which facilitating highly efficient electron transfer; ii) the directed transfer of electrons to the (110) crystal plane of CdNCN, promoting optimal hydrogen adsorption and active participation in the hydrogen evolution reaction. This study provides a new method for synthesizing CdNCN materials and offers insights into the design and preparation of innovative atomic-level composite semiconductor photocatalysts. |
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| ISSN: | 2772-834X |