| Autor: |
Jingyu Zhang, Jialong Li, Jinwei He, Yalin He, Zelin Wang, Shuang Li, Zhanli Chai, Kun Lan |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Next Materials, Vol 4, Iss , Pp 100105- (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2949-8228 |
| DOI: |
10.1016/j.nxmate.2024.100105 |
| Popis: |
The carbon nitride (C3N4) materials and hybrids have been acknowledged as promising photocatalysts for decades. The precise design and modulation of C3N4-based photocatalyst in defects and energy bands for further promotion is of importance but less investigated. In this work, a type of defective V2O5/C3N4 heterojunction with dual oxygen and carbon vacancy on interface is designed through simple annealing and plasma etching. The incorporation of V2O5 enables to promote the separation efficiency for photo-induced carriers and enhance built-in electric field (BIEF) at junction boundary to accelerate charge transport. The designed double defects in V2O5/C3N4 further results in a type-II heterojunction and switch of redox reaction sites, preventing photocatalytic corrosion of unstable V2O5. As a result, owing to the integrated advantages of such composite photocatalyst, the defective V2O5/C3N4 heterojunction exhibits a comparable hydrogen evolution rate of 0.90 mmol·g−1·h−1 to V2O5/C3N4, and dramatically improved regeneration with a continuous hydrogen evolution rate of 0.83 mmol·g−1·h−1 for 5 cycles. Our study is envisaged to provide a toolbox for rationally designing compositive nanomaterials toward high-efficiency photocatalytic systems. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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