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Huizhong Wu, Ruiheng Liang, Yujie Chen, Xiuwu Zhang, Jingyang Liu, Zehua Xia, Ignasi Sirés, Minghua Zhou. Peroxymonosulfate activation on the S-scheme heterojunction Bi4O5I2/TiO2 photoanode of a photocatalytic fuel cell for degradation of tetracyclines with green power generation. Green Energy&Environment. doi: 10.1016/j.gee.2025.10.002
Citation: Huizhong Wu, Ruiheng Liang, Yujie Chen, Xiuwu Zhang, Jingyang Liu, Zehua Xia, Ignasi Sirés, Minghua Zhou. Peroxymonosulfate activation on the S-scheme heterojunction Bi4O5I2/TiO2 photoanode of a photocatalytic fuel cell for degradation of tetracyclines with green power generation. Green Energy&Environment. doi: 10.1016/j.gee.2025.10.002
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Peroxymonosulfate activation on the S-scheme heterojunction Bi4O5I2/TiO2 photoanode of a photocatalytic fuel cell for degradation of tetracyclines with green power generation

doi: 10.1016/j.gee.2025.10.002

  • a. Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China;

  • b. Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China;

  • c. Laboratori d’Electroquímica dels Materials i del Medi Ambient, Departament de Ciència de Materials i Química Física, Secció de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain

Funds:

This work was financially supported by the National Key R&

D Program International Cooperation Project (No. 2023YFE0108100), Natural Science Foundation of Tianjin (No. 24JCYBJC01890), and Fundamental Research Funds for the Central Universities, Nankai University, and National Research Foundation IRG - China/Spain Research Cooperation Programme. The visiting PhD scholarship awarded to H.Z. Wu (State Scholarship Fund, CSC, China) is acknowledged. I.S. is grateful to project PID2022-140378OB-I00, funded by MICIU/AEI/10.13039/501100011033 (Spain) and by ERDF/EU.

  • Received date 13 June 2025, Accepted date 08 October 2025, RevRecd date 13 August 2025, Available online 13 October 2025
    Abstract
  • Photocatalytic fuel cells (PFC) are green devices for simultaneous contaminant degradation and power generation. However, their performance is still limited due to the inefficient light capture and poor charge transfer at photoanodes. Here, a PFC has been successfully developed using a Bi4O5I2/TiO2 nanotube arrays (NTAs) S-scheme heterojunction as the photoanode, incorporating peroxymonosulfate (PMS) as synergistic precursor of reactive oxygen species (ROS). A 17-fold increase in rate constant for the degradation of tetracycline (TC) and 6.6-fold increase in maximum power generation was attained in comparison with the TiO2/light PFC system. A systematic analysis elucidating PMS-mediated regulation of ROS generation and electron transfer was performed. The photocatalytic mechanism, dominated by non-radical 1O2 and photogenerated holes (h+), led to a maximum photocurrent density (0.091 mA cm-2) and output power (0.99 mW cm-2). The current work demonstrates the great robustness of heterojunction-based PFC as new self-powered water decontamination systems.

     

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