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大学物理实验, 2025, 38(4): 7-17     https://doi.org/10,14139/j.cnki.cn22-1228.2025.04.002
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C3N4/CoPx界面优化增强光催化制氢研究
刘情操1,郑小春2,庄云朋3,刘文军1*
1.哈尔滨工业大学(威海)理学院光电科学系,山东 威海 264209;2.烟台职业学院 智能制造系,山东 烟台264670;3.烟台职业学院 智能控制系,山东 烟台264670
Optimization of C3N4/CoPx Interface with L-Cys Molecule to Enhance Photocatalytic Hydrogen
LIU Qingcao1,ZHENG Xiaochun2,ZHUANG Yunpeng3,LIU Wenjun1
1.Department of Optoelectronic Science,Harbin Institute of Technology at Weihai,Weihai City 264209,China;2.Department of Intelligent Manufacturing,Yantai Vocational College,Yantai City 264670,China;3.Department of Intelligent Control,Yantai Vocational College,Yantai City 264670,China
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摘要 

对于半导体纳米复合体系而言,由于不同成分的晶格失配以及固有的纳米尺寸,通常存在大量的点缺陷、面缺陷等,尤其是界面缺陷严重影响载流子界面输运过程,因此研究如何实现纳米复合体系的界面缺陷钝化具有重要的理论意义和应用价值。以光催化剂石墨氮化碳(C3N4)和过渡金属磷化物(CoP)复合体系为研究对象,从实验和理论两方面研究了L-半胱氨酸(L-Cys)分子桥接配体实现C3N4/CoPx界面优化以增强光催化制氢活性。利用傅里叶变换红外光谱仪(FT-IR)和 X 射线光电子能谱(XPS)研究了C3N4和 CoPx纳米粒子之间的成键情况,结果表明 L-Cys 的-COO-和-NH2功能团分别与CoPx纳米粒子的Co和P原子共价结合,从而实现R-C3N4/CoPx的界面优化。利用时间分辨荧光光谱和电化学测试分析了L-Cys桥接配体对R-C3N4/CoPx界面电子转移行为的影响,结果表明 L-Cys 桥接配体的引入实现了界面优化,能够使 R-C3N4/CoPx的荧光寿命减半、电子转移阻抗降低一个数量级、表面电荷转移效率提高接近16%,从而R-C3N4/CoPx的光催化产氢速率提高16.5倍。

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刘情操
郑小春
庄云朋
刘文军
关键词:  C3N4/CoPx纳米复合体系  界面优化  光催化析氢     
Abstract: 

For semiconductor nanocomposite systems,there are usually a large number of defects such as points and surfaces,due to the lattice mismatch of different components and interface pollution.Especially,the interface defects seriously affect the carrier interface transport process,thus significantly inhibiting its photoelectric conversion performance.The composite system of photocatalyst graphite nitride carbon (C3N4)and transition metal phosphide (CoP)is taking as research material.Interface optimization of C3N4/CoPx using L-Cys molecular bridging ligand to enhance photocatalytic hydrogen production activity.C3N4 nanosheets were prepared by hot polymerized urea/melamine mixture.C-SH bond and C3N4were covalently bonded by L-Cys molecular sensitization,and R-C3N4/CoPx was prepared by photodeposition loaded with CoPx nanoparticles (NPs).The results show that the —COO- and —NH2 functional groups of L-Cys are covalent with Co and P atoms of CoPx NPs respectively. The influence of L-Cys bridging ligand on the electron interface transfer behavior of R-C3N4/CoPx was investigated by time-resolved fluorescence spectroscopy and electrochemical tests.The results showed that the introduction of L-Cys bridging ligand could halve the fluorescence lifetime of R-C3N4/CoPx,reduce the electron transfer impedance by one order of magnitude,and improve the surface charge transfer efficiency by nearly 16%.Thus,the R-C3N4/Co x photocatalytic hydrogen evolution rate increased by 16.5 times.

Key words:  C3N4/CoPx nanocomposite    interface optimization    photocatalytic hydrogen evolution
               出版日期:  2025-08-25      发布日期:  2025-08-25      整期出版日期:  2025-08-25
ZTFLH:  O 469  
基金资助: 

国家自然科学基金(12204132);山东省自然科学基金(tsqn202408113,ZR2024QB387,ZR2024QB388

引用本文:    
刘情操, 郑小春, 庄云朋 , 刘文军. C3N4/CoPx界面优化增强光催化制氢研究 [J]. 大学物理实验, 2025, 38(4): 7-17.
LIU Qingcao, ZHENG Xiaochun, ZHUANG Yunpeng, LIU Wenjun. Optimization of C3N4/CoPx Interface with L-Cys Molecule to Enhance Photocatalytic Hydrogen . Physical Experiment of College, 2025, 38(4): 7-17.
链接本文:  
https://dawushiyan.jlict.edu.cn/CN/10,14139/j.cnki.cn22-1228.2025.04.002  或          https://dawushiyan.jlict.edu.cn/CN/Y2025/V38/I4/7
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