物理化学学报 >> 2025, Vol. 41 >> Issue (12): 100158.doi: 10.1016/j.actphy.2025.100158

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无机-有机CdS/YBTPy S型光催化剂高效产氢及其机理

魏勉1,2, 程畅3, 何博文3, 程蓓1,2, 戚克振1,*(), 别传彪3,*()   

  1. 1 大理大学药学院, 云南 大理 671003
    2 武汉理工大学材料复合新技术全国重点实验室, 湖北 武汉 430070
    3 中国地质大学(武汉), 材料与化学学院, 太阳燃料实验室, 湖北 武汉 430078
  • 收稿日期:2025-08-04 修回日期:2025-08-12 录用日期:2025-08-14 发布日期:2025-10-23
  • 通讯作者: Email: qikezhen@dali.edu.cn (戚克振)biechuanbiao@cug.edu.cn (别传彪)
  • 基金资助:
    国家重点研发计划(2022YFB3803600); 国家自然科学基金(22202187); 国家自然科学基金(U24A2071); 国家自然科学基金(22278324); 国家自然科学基金(22361142704); 国家自然科学基金(22409181); 国家自然科学基金(U23A20102); 湖北省自然科学基金(2025AFB492); 湖北省自然科学基金(2022CFA001); 湖北省重点研发计划项目(2023BAB113)

Inorganic-organic CdS/YBTPy S-scheme photocatalyst for efficient hydrogen production and its mechanism

Mian Wei1,2, Chang Cheng3, Bowen He3, Bei Cheng1,2, Kezhen Qi1,*(), Chuanbiao Bie3,*()   

  1. 1 College of Pharmacy, Dali University, Dali 671003, Yunnan Province, China
    2 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, Hubei Province, China
    3 Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430078, Hubei Province, China
  • Received:2025-08-04 Revised:2025-08-12 Accepted:2025-08-14 Published:2025-10-23
  • Contact: Email: qikezhen@dali.edu.cn (Kezhen Qi)biechuanbiao@cug.edu.cn (Chuanbiao Bie)
  • Supported by:
    the financial support from the National Key Research and Development Program of China(2022YFB3803600); the National Natural Science Foundation of China(22202187); the National Natural Science Foundation of China(U24A2071); the National Natural Science Foundation of China(22278324); the National Natural Science Foundation of China(22361142704); the National Natural Science Foundation of China(22409181); the National Natural Science Foundation of China(U23A20102); the Hubei Provincial Natural Science Foundation of China(2025AFB492); the Hubei Provincial Natural Science Foundation of China(2022CFA001); the Key R & D Program Projects in Hubei Province(2023BAB113)

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摘要：

S型异质结因其优异的电荷分离能力和最大化的氧化还原电位，在高效光催化产氢领域受到广泛关注。本研究通过Yamamoto偶联反应合成新型芘-苯并噻二唑共轭聚合物(YBTPy)，并采用溶剂热法原位沉积CdS纳米颗粒，构建了CdS/YBTPy S型异质结光催化剂。优化后的CP5复合材料产氢速率达5.01 mmol h−1 g−1，较纯相CdS(1.20 mmol h−1 g−1)提升4.2倍。通过原位辐照X射线光电子能谱结合开尔文探针力显微镜，阐明了异质结界面的特征性S型电荷转移路径。此外，采用飞秒瞬态吸收光谱研究了光生载流子的动力学行为。该工作为有机-无机杂化S型光催化体系的设计提供了新的理论基础。

关键词: 共轭聚合物, S型异质结, 光催化产氢, 飞秒瞬态吸收光谱

Abstract:

S-scheme heterojunctions have garnered significant attention for efficient photocatalytic H2 evolution due to their superior charge separation and maximized redox potential. In this study, we developed a novel pyrene-benzothiadiazole conjugated polymer (YBTPy) through Yamamoto coupling, followed by the in situ deposition of CdS nanoparticles via a solvothermal method to construct a CdS/YBTPy S-scheme heterojunction photocatalyst. The optimized composite, designated as CP5, demonstrated a hydrogen production rate of 5.01 mmol h−1 g−1, representing a 4.2-fold enhancement compared to pristine CdS (1.20 mmol h−1 g−1). The characteristic S-scheme charge transfer pathway at the heterojunction interface was elucidated using in situ irradiated X-ray photoelectron spectroscopy in conjunction with Kelvin probe force microscopy. Additionally, femtosecond transient absorption spectroscopy was employed to investigate the dynamics of photogenerated charge carriers. This work provides a new theoretical foundation for the design of organic–inorganic hybrid S-scheme photocatalytic systems.

Key words: Conjugated polymers, S-scheme heterojunction, Photocatalytic hydrogen evolution, Femtosecond transient absorption spectroscopy