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<p>The efficient remediation of tetracycline hydrochloride (TCH) residues is of paramount importance for safeguarding ecological integrity. Herein, Co-Mo bimetallic carbide/N-doped carbon/MXene heterostructures (Co<sub>3</sub>Mo<sub>3</sub>C/NC/MXene) were successfully synthesized via a coordination assembly-confined carbonization strategy that integrates polyoxometalates (POMs) with MXene. This hierarchical design creates a porous architecture featuring dual redox pairs (Co<sup>2+</sup>/Co<sup>3+</sup>, Mo<sup>4+</sup>/Mo<sup>6+</sup>), which can effectively activate peroxymonosulfate (PMS) to generate large amounts of reactive oxygen species (e.g., SO<sub>4</sub>⁻·, ·OH, and ·O<sub>2</sub>⁻). Leveraging the synergy between advanced oxidation and photocatalysis, the optimized photocatalyst (MP-2) achieves a 96.97% degradation efficiency for TCH and removes 64.58% of the initial total organic carbon within 30&#xa0;min. Notably, the catalyst maintains 90% of its initial efficiency after five cycles, demonstrating excellent recyclability and stability. Additionally, phytotoxicity assessments using mung bean sprouts confirm that the degradation products are detoxified. This work provides novel insights into engineering multifunctional POM-derived composites for sustainable environmental remediation.</p> Graphical abstract <p></p>

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Polyoxometalates/MXene composite photocatalysts-mediated synergistic activating peroxymonosulfate for efficient tetracycline hydrochloride degradation

  • 期刊论文

  • 发表日期：

    2026年8月1日

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  • Yuancheng Jiang,
  • Haoqi Guo,
  • Zhongyi He,
  • Liping Xiong,
  • Lili Li,
  • Shaohui Wang,
  • Yufeng Liu,
  • Guochuang Zhao,
  • Guoping Yang,
  • Yayu Dong

摘要

The efficient remediation of tetracycline hydrochloride (TCH) residues is of paramount importance for safeguarding ecological integrity. Herein, Co-Mo bimetallic carbide/N-doped carbon/MXene heterostructures (Co3Mo3C/NC/MXene) were successfully synthesized via a coordination assembly-confined carbonization strategy that integrates polyoxometalates (POMs) with MXene. This hierarchical design creates a porous architecture featuring dual redox pairs (Co2+/Co3+, Mo4+/Mo6+), which can effectively activate peroxymonosulfate (PMS) to generate large amounts of reactive oxygen species (e.g., SO4⁻·, ·OH, and ·O2⁻). Leveraging the synergy between advanced oxidation and photocatalysis, the optimized photocatalyst (MP-2) achieves a 96.97% degradation efficiency for TCH and removes 64.58% of the initial total organic carbon within 30 min. Notably, the catalyst maintains 90% of its initial efficiency after five cycles, demonstrating excellent recyclability and stability. Additionally, phytotoxicity assessments using mung bean sprouts confirm that the degradation products are detoxified. This work provides novel insights into engineering multifunctional POM-derived composites for sustainable environmental remediation.

Graphical abstract