Citation: Mian Wei, Chang Cheng, Bowen He, Bei Cheng, Kezhen Qi, Chuanbiao Bie. Inorganic-organic CdS/YBTPy S-scheme photocatalyst for efficient hydrogen production and its mechanism[J]. Acta Physico-Chimica Sinica, ;2025, 41(12): 100158. doi: 10.1016/j.actphy.2025.100158 shu

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

Mian Wei ^{1, 2} ,
Chang Cheng ³ ,
Bowen He ³ ,
Bei Cheng ^{1, 2} ,
Kezhen Qi ^1,, ,
Chuanbiao Bie ^3,,

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

Corresponding author: Kezhen Qi, qikezhen@dali.edu.cn Chuanbiao Bie, biechuanbiao@cug.edu.cn
Received Date: 4 August 2025
Revised Date: 12 August 2025
Accepted Date: 14 August 2025

Fund Project: the financial support from the National Key Research and Development Program of China 2022YFB3803600the National Natural Science Foundation of China 22202187the National Natural Science Foundation of China U24A2071the National Natural Science Foundation of China 22278324the National Natural Science Foundation of China 22361142704the National Natural Science Foundation of China 22409181the National Natural Science Foundation of China U23A20102the Hubei Provincial Natural Science Foundation of China 2025AFB492the Hubei Provincial Natural Science Foundation of China 2022CFA001the Key R & D Program Projects in Hubei Province 2023BAB113

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.
- Conjugated polymers,
- S-scheme heterojunction,
- Photocatalytic hydrogen evolution,
- Femtosecond transient absorption spectroscopy
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沈阳化工大学材料科学与工程学院沈阳 110142