构建共价三嗪框架/氮掺杂碳包覆氧化亚铜S型异质结促进光催化制氢  

Constructing Covalent Triazine Frameworks/N-Doped Carbon-Coated Cu_(2)O S-Scheme Heterojunctions for Boosting Photocatalytic Hydrogen Production

作　　者：黄凯辉 陈德俊 张欣 沈荣晨 张鹏[4] 许第发[5] 李鑫[1,2] Kaihui Huang;Dejun Chen;Xin Zhang;Rongchen Shen;Peng Zhang;Difa Xu;Xin Li(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;Key Laboratory for Biobased Materials and Energy of Ministry of Education,College of Materials and Energy,South China Agricultural University,Guangzhou 510642,China;Hubei Key Lab Low Dimens Optoelect Mat&Devices,Hubei University of Arts and Science,Xiangyang 441053,Hubei Province,China;State Centre for International Cooperation on Designer Low-Carbon&Environmental Materials(CDLCEM),School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China;Hunan Key Laboratory of Applied Environmental Photocatalysis,Changsha University,Changsha 410022,China)

机构地区：[1]华南农业大学,生物质工程研究院,农业农村部能源植物资源与利用重点实验室,广州510642 [2]华南农业大学,材料与能源学院,生物基材料与能源教育部重点实验室,广州510642 [3]湖北文理学院,低维光电材料与器件湖北省重点实验室,湖北襄阳441053 [4]郑州大学,材料科学与工程学院,低碳环保材料国际合作中心(CDLCEM),郑州450001 [5]长沙学院,应用环境光催化湖南省重点实验室,长沙410022

出　　处：《物理化学学报》2024年第12期19-20,共2页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(22378148,21975084,2230082074);广东省自然科学基金(2024A1515012433)资助项目。

摘　　要：开发用于制氢的高效光催化剂在可持续能源研究中至关重要。本研究设计并制备了一种具有S型异质结结构的共价三嗪框架(CTF)-Cu_(2)O@NC复合材料,旨在提高光催化制氢的效率。由于氮掺杂碳(NC)层和S型异质结的协同效应,复合物的光吸收能力、电子-空穴分离效率和产氢活性显著增强。该系统的结构和光电化学表征表明,S型异质结不仅提高了光生载流子的分离效率,而且还保持了很强的氧化还原能力,从而进一步促进了光催化反应。此外,NC层可以同时减少Cu_(2)O的光腐蚀并促进电子转移。实验结果表明,CTF-7%Cu_(2)O@NC复合材料在可见光照射下表现出优异的制氢性能,达到15645μmol·g^(-1)·h^(-1),大大超过了纯CTF的光催化活性(2673μmol·g^(-1)·h^(-1))。这项研究为开发高效、创新的光催化材料提供了一种新方法,有力地支持了可持续氢能源的发展。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)-Cu_(2)O@NC composite featuring an S-scheme heterojunction structure aimed at enhancing the photocatalytic hydrogen production.The light absorption capacity,electron-hole separation efficiency and H_(2)-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 Cu_(2)O and promote the electron transfer.Experimental results demonstrate that the CTF-7%Cu_(2)O@NC composite shows outstanding hydrogen-production performance under visible light,achieving 15645μmol∙g^(−1)∙h^(−1),significantly surpassing the photocatalytic activity of pure CTF(2673μmol∙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.

关 键 词：光催化制氢 Cu_(2)O@NC 共价三嗪框架(CTF) S型异质结 氮掺杂碳 

分 类 号：O643[理学—物理化学]