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<p>The advanced oxidation process based on persulfates is currently one of the most mainstream methods for treating water pollution. If the synthesized catalyst material can efficiently activate persulfates while also synergistically utilizing light irradiation to some extent, it would better meet practical demands. Here, a composite heterojunction of MoS<sub>2</sub>/CoMn<sub>2</sub>O<sub>4</sub> was prepared using a hydrothermal technique of activating PMS to deform ceftriaxone sodium in water. The experimental findings show that the nanosheet-like MoS<sub>2</sub> which forms a bridging structure with CoMn<sub>2</sub>O<sub>4</sub> microspheres was found to greatly improve visible-light harvesting and consequently improve the activation kinetics of the PMS. It was found that the system could degrade to a level of 85% in 5&#xa0;min, and under optimal reaction conditions, the degradation rate of CTRX can reach below the instrument detection limit in 20&#xa0;min. The experiments of quenching and electron paramagnetic resonance (EPR) revealed that the non-traditional radical mode prevalent in the degradation process is the presence of the superoxide radical (•O₂<sup>−</sup>), which is the main active radical. This catalytic system is remarkable because, in addition to the strong synergy between MoS₂ and CoMn<sub>2</sub>O<sub>4</sub>, the rapid redox cycling of Co/Mn/Mo species also affords a substantial driving force for the photoassisted catalytic reaction. In addition, the composite is highly stable and reusable, which highlights its prospective to be practically applicable to eliminate the antibiotics contaminations of the water.</p>

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Synergistically enhanced photocatalytic activation of peroxymonosulfate by the MoS2/CoMn2O4 heterojunction composite for efficient degradation of ceftriaxone sodium

  • 期刊论文

  • 发表日期：

    2026年5月1日

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  • Junming Zhang,
  • Lixue Wang,
  • Yinghua Hao,
  • Fangwei Ma,
  • Jiafeng Wan

摘要

The advanced oxidation process based on persulfates is currently one of the most mainstream methods for treating water pollution. If the synthesized catalyst material can efficiently activate persulfates while also synergistically utilizing light irradiation to some extent, it would better meet practical demands. Here, a composite heterojunction of MoS2/CoMn2O4 was prepared using a hydrothermal technique of activating PMS to deform ceftriaxone sodium in water. The experimental findings show that the nanosheet-like MoS2 which forms a bridging structure with CoMn2O4 microspheres was found to greatly improve visible-light harvesting and consequently improve the activation kinetics of the PMS. It was found that the system could degrade to a level of 85% in 5 min, and under optimal reaction conditions, the degradation rate of CTRX can reach below the instrument detection limit in 20 min. The experiments of quenching and electron paramagnetic resonance (EPR) revealed that the non-traditional radical mode prevalent in the degradation process is the presence of the superoxide radical (•O₂−), which is the main active radical. This catalytic system is remarkable because, in addition to the strong synergy between MoS₂ and CoMn2O4, the rapid redox cycling of Co/Mn/Mo species also affords a substantial driving force for the photoassisted catalytic reaction. In addition, the composite is highly stable and reusable, which highlights its prospective to be practically applicable to eliminate the antibiotics contaminations of the water.