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Junhao Ma, Qincan Ma, Jinyuan Zhang, Shuang Fu, Ziyang Ren, Xianzhong Lin, Yongjin Li, Yueli Zhang. Atomically Bonded S-Scheme Heterojunctions with Photothermal–Pyroelectric Synergy for Efficient H2O2 Photosynthesis. Green Energy&Environment. doi: 10.1016/j.gee.2026.04.008
Citation: Junhao Ma, Qincan Ma, Jinyuan Zhang, Shuang Fu, Ziyang Ren, Xianzhong Lin, Yongjin Li, Yueli Zhang. Atomically Bonded S-Scheme Heterojunctions with Photothermal–Pyroelectric Synergy for Efficient H2O2 Photosynthesis. Green Energy&Environment. doi: 10.1016/j.gee.2026.04.008
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Atomically Bonded S-Scheme Heterojunctions with Photothermal–Pyroelectric Synergy for Efficient H2O2 Photosynthesis

doi: 10.1016/j.gee.2026.04.008

  • 1. State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou, Guangdong 510275, China;

  • 2. School of Integrated Circuits, Sun Yat-Sen University, Shenzhen, Guangdong 518107, China;

  • 3. School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China

Funds:

This work was financially supported by the National Natural Science Foundation of China (No. 12204207, and 61975245), Natural Science Foundation of Guangdong Province (No. 2024A1515010729). We are grateful for the HZWTECH for providing computation facilities, to Jingying Sun (Instrumental Analysis and Research Center, Sun Yat-sen Univsersity) for assistance with TEM measurements, and to SCI-GO (https://www.sci-go.com) for the finite element simulation in COMSOL and DFT calculations.

  • Received date 08 January 2026, Accepted date 28 April 2026, RevRecd date 07 April 2026, Available online 07 May 2026
    Abstract
  • Solar-driven photocatalysis offers a sustainable pathway for energy conversion and environmental remediation, yet it is often hindered by inefficient charge separation and limited solar spectrum utilization. To address these challenges, this study introduces a novel design strategy by constructing a full-spectrum-responsive BiOBr/(Bi(Bi2S3)9I3)0.667 S-scheme heterojunction that synergistically integrates photothermal and pyroelectric effects. This design utilizes the narrow band gaps (Bi(Bi2S3)9I3)0.667 and localized surface plasmon resonance caused by oxygen vacancies as near-infrared response elements. Its inherent photothermal conversion capability provides an endogenous thermal field for the system, while the unique pyroelectric property of (Bi(Bi2S3)9I3)0.667 generates a spontaneous polarization electric field under temperature fluctuations, thereby directionally driving charge carrier migration and effectively mitigating thermal-induced recombination. Concurrently, an atomically precise interface formed via shared Bi atoms establishes an efficient S-scheme charge transfer pathway, further promoting carrier separation and prolonging carrier lifetime. As a result, the optimized photocatalyst exhibits an exceptional H2O2 production rate of 383.4 μmol g−1 h−1 and achieves efficient Cr(VI) reduction with a rate constant of 0.177 min−1, demonstrating its potential as a multifunctional photocatalytic material. This work opens a new avenue for developing high-performance photocatalysts through the integration of atomic-level interfacial bridging with endogenous pyroelectric polarization.

     

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