Enhanced and synergistic catalytic activation by photoexcitation driven S−scheme heterojunction hydrogel interface electric field

Aiwen Wang, Meng Du, Jiaxin Ni, Dongqing Liu, Yunhao Pan, Xiongying Liang, Dongmei Liu (), Jun Ma, Jing Wang () and Wei Wang ()
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Aiwen Wang: Harbin Institute of Technology
Meng Du: Harbin Institute of Technology
Jiaxin Ni: Harbin Institute of Technology
Dongqing Liu: Harbin Institute of Technology
Yunhao Pan: Harbin Institute of Technology
Xiongying Liang: Harbin Institute of Technology
Dongmei Liu: Harbin Institute of Technology
Jun Ma: Harbin Institute of Technology
Jing Wang: ETH Zürich
Wei Wang: Harbin Institute of Technology

Nature Communications, 2023, vol. 14, issue 1, 1-12

Abstract: Abstract The regulation of heterogeneous material properties to enhance the peroxymonosulfate (PMS) activation to degrade emerging organic pollutants remains a challenge. To solve this problem, we synthesize S−scheme heterojunction PBA/MoS2@chitosan hydrogel to achieve photoexcitation synergistic PMS activation. The constructed heterojunction photoexcited carriers undergo redox conversion with PMS through S−scheme transfer pathway driven by the directional interface electric field. Multiple synergistic pathways greatly enhance the reactive oxygen species generation, leading to a significant increase in doxycycline degradation rate. Meanwhile, the 3D polymer chain spatial structure of chitosan hydrogel is conducive to rapid PMS capture and electron transport in advanced oxidation process, reducing the use of transition metal activator and limiting the leaching of metal ions. There is reason to believe that the synergistic activation of PMS by S−scheme heterojunction regulated by photoexcitation will provide a new perspective for future material design and research on enhancing heterologous catalysis oxidation process.

Date: 2023
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DOI: 10.1038/s41467-023-42542-6

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