Citation: Kaihui Huang, Dejun Chen, Xin Zhang, Rongchen Shen, Peng Zhang, Difa Xu, Xin Li. Constructing Covalent Triazine Frameworks/N-Doped Carbon-Coated Cu₂O S-Scheme Heterojunctions for Boosting Photocatalytic Hydrogen Production[J]. Acta Physico-Chimica Sinica, ;2024, 40(12): 240702. doi: 10.3866/PKU.WHXB202407020 shu

Constructing Covalent Triazine Frameworks/N-Doped Carbon-Coated Cu₂O S-Scheme Heterojunctions for Boosting Photocatalytic Hydrogen Production

Kaihui Huang ^1,2 ,
Dejun Chen ² ,
Xin Zhang ^3,, ,
Rongchen Shen ^1,2,, ,
Peng Zhang ^4,, ,
Difa Xu ⁵ ,
Xin Li ^1,2,,

1.
Institute of Biomass Engineering, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou 510642, China;
2.
Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China;
3.
Hubei Key Lab Low Dimens Optoelect Mat & Devices, Hubei University of Arts and Science, Xiangyang 441053, Hubei Province, China;
4.
State Centre for International Cooperation on Designer Low-Carbon & Environmental Materials (CDLCEM), School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China;
5.
Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha 410022, China

Corresponding author: Xin Zhang, Rongchen Shen, Peng Zhang, Xin Li,
Received Date: 21 July 2024
Revised Date: 18 September 2024
Accepted Date: 19 September 2024

Fund Project: The project was supported from the National Natural Science Foundation of China (22378148, 21975084, 2230082074) and Natural Science Foundation of Guangdong Province (2024A1515012433).

The development of efficient photocatalysts for hydrogen production is crucial in sustainable energy research. In this study, we designed and prepared a Covalent Triazine Framework (CTF)-Cu₂O@NC composite featuring an S-scheme heterojunction structure aimed at enhancing the photocatalytic hydrogen production. The light absorption capacity, electron-hole separation efficiency and H₂-evolution activity of the composite were significantly enhanced due to the synergistic effects of the nitrogen-doped carbon (NC) layer and the S-scheme heterojunction. Structural and photoelectrochemical characterization of the system reveal that the S-scheme heterojunctions not only enhance the separation efficiency of photogenerated carriers but also maintain the strong redox capabilities to further promote the photocatalytic reactions. Moreover, the NC layer could simultaneously reduce the photocorrosion of Cu₂O and promote the electron transfer. Experimental results demonstrate that the CTF-7% Cu₂O@NC composite shows outstanding hydrogen-production performance under visible light, achieving 15645 μmol∙g^-1∙h^-1, significantly surpassing the photocatalytic activity of pure CTF (2673 μmol∙g^-1∙h^-1). This study introduces a novel approach to the development of efficient and innovative photocatalytic materials, strongly supporting the advancement of sustainable hydrogen energy.
- Photocatalytic hydrogen evolution,
- Cu₂O@NC,
- Covalent triazine frameworks (CTF),
- S-scheme heterojunction,
- Nitrogen doped carbon
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Constructing Covalent Triazine Frameworks/N-Doped Carbon-Coated Cu2O S-Scheme Heterojunctions for Boosting Photocatalytic Hydrogen Production

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通讯作者: 陈斌, bchen63@163.com

Constructing Covalent Triazine Frameworks/N-Doped Carbon-Coated Cu₂O S-Scheme Heterojunctions for Boosting Photocatalytic Hydrogen Production