Citation: Yongmei Xia, Zuming He, Gang He, Lianxiang Chen, Juan Zhang, Jiangbin Su, Muhammad Saboor Siddique, Xiaofei Fu, Guihua Chen, Wei Zhou. Lead-free perovskite Cs₃Bi₂Br₉/FeS₂ hollow core-shell Z-scheme heterojunctions toward optimized photothermal-photocatalytic H₂ production[J]. Chinese Chemical Letters, ;2025, 36(10): 111521. doi: 10.1016/j.cclet.2025.111521 shu

Lead-free perovskite Cs₃Bi₂Br₉/FeS₂ hollow core-shell Z-scheme heterojunctions toward optimized photothermal-photocatalytic H₂ production

Yongmei Xia ^{a, c} ,
Zuming He ^{a, f, *,} ,
Gang He ^a ,
Lianxiang Chen ^a ,
Juan Zhang ^a ,
Jiangbin Su ^a ,
Muhammad Saboor Siddique ^{b, *,} ,
Xiaofei Fu ^c ,
Guihua Chen ^d ,
Wei Zhou ^{e, *,}

a.
School of New Energy Science & Engineering, Xinyu University, Xinyu 338004, China
b.
Institute of Environment and Ecology, Tsinghua-Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
c.
School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China
d.
School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, China
e.
Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Ji’nan 250353, China
f.
School of Microelectronics and Control Engineering, Changzhou University, Changzhou 213164, China

hezuming432928@126.com

saboorsiddique.uaf@gmail.com

wzhou@qlu.edu.cn

Received Date: 6 February 2025
Revised Date: 25 June 2025
Accepted Date: 27 June 2025
Available Online: 27 June 2025

Figures(4)

Photothermal catalysis is a promising technology primarily utilized the solar energy to produce photogenerated e^-/h⁺ pairs together with the production of heat energy. However, the inefficient separation of charge carriers and inadequate response to near-infrared (NIR) light usually leads to the unsatisfactory photocatalytic efficiency, hindering their application potentials. In this work, a significantly enhanced photothermal catalytic hydrogen evolution reaction over the lead-free perovskite Cs₃Bi₂Br₉/FeS₂ (CBB/FS) heterostructure is simultaneously verified, where the CBB/FS Z-scheme heterojunctions display the strong stability and superb photothermal catalytic activity. Under the simulated solar irradiation (AM 1.5G), the optimized CBB/FS-5 achieves a photocatalytic hydrogen evolution rate of 31.5 mmol g^-1 h^-1, which is 112.6 and 77.1 times higher than that of FS and CBB, respectively, together with an apparent quantum yield of 29.5% at 420 nm. This significantly improved photocatalytic H₂ evolution can be mainly attributed to the Z-scheme charge transfer and photothermal-assisted synergistically enhanced photocatalytic H₂ production, and the potential mechanism of the enhanced photocatalytic H₂ evolution is also proposed by photoelectrochemical characterizations, in situ XPS, EPR spectra, and the DFT calculations. This work provides new insights to the design of high-efficient photothermal catalysts, leading to the sustainable and efficient solutions towards the energy and environmental challenges.
- Photocatalytic H₂ evolution,
- FeS₂,
- Lead-free perovskite Cs₃Bi₂Br₉,
- Photothermal-photocatalysis,
- Z-scheme heterojunction
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通讯作者: 陈斌, bchen63@163.com

Lead-free perovskite Cs₃Bi₂Br₉/FeS₂ hollow core-shell Z-scheme heterojunctions toward optimized photothermal-photocatalytic H₂ production