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Harnessing air-water interface to generate interfacial ROS for ultrafast environmental remediation

Author

Listed:
  • Ruijie Xie

    (Sun Yat-sen University)

  • Kaiheng Guo

    (Sun Yat-sen University)

  • Yong Li

    (University of Bremen)

  • Yingguang Zhang

    (The University of Hong Kong)

  • Huanran Zhong

    (Sun Yat-sen University)

  • Dennis Y. C. Leung

    (The University of Hong Kong)

  • Haibao Huang

    (Sun Yat-sen University
    Xinjiang University)

Abstract

The air-water interface of microbubbles represents a crucial microenvironment that can dramatically accelerate reactive oxidative species (ROS) reactions. However, the dynamic nature of microbubbles presents challenges in probing ROS behaviors at the air-water interface, limiting a comprehensive understanding of their chemistry and application. Here we develop an approach to investigate the interfacial ROS via coupling microbubbles with a Fenton-like reaction. Amphiphilic single-Co-atom catalyst (Co@SCN) is employed to efficiently transport the oxidant peroxymonosulfate (PMS) from the bulk solution to the microbubble interface. This triggers an accelerated generation of interfacial sulfate radicals (SO4•−), with 20-fold higher concentration (4.48 × 10−11 M) than the bulk SO4•−. Notably, the generated SO4•− is preferentially situated at the air-water interface due to its lowest free energy and the strong hydrogen bonding interactions with H3O+. Moreover, it exhibits the highest oxidation reactivity toward gaseous pollutants like toluene, with a rate constant of 1010 M−1 s−1-over 100 times greater than bulk reactions. This work demonstrates a promising strategy to harness the air-water interface for accelerating ROS-induced reactions, highlighting the importance of interfacial ROS and its potential application.

Suggested Citation

  • Ruijie Xie & Kaiheng Guo & Yong Li & Yingguang Zhang & Huanran Zhong & Dennis Y. C. Leung & Haibao Huang, 2024. "Harnessing air-water interface to generate interfacial ROS for ultrafast environmental remediation," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-53289-z
    DOI: 10.1038/s41467-024-53289-z
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    References listed on IDEAS

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