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<p>In this work, a facilely synthesized MIL-100 (Fe)/CNTs composite photocatalyst was developed for the efficient degradation of lomefloxacin (LOMH). Results from UV-vis diffuse reflectance spectroscopy, photoluminescence spectroscopy, and electrochemical tests indicate that the composite has a smaller bandgap of 1.70&#xa0;eV and exhibits better photogenerated carrier separation performance. After 60&#xa0;min of LED irradiation, the optimal MFC-15 (1&#xa0;g/L) degraded 88.3% of LOMH with an initial concentration of 0.02&#xa0;g/L. Its apparent reaction rate constant (3.56 × 10<sup>−2</sup>&#xa0;min<sup>−1</sup>) outperformed pristine MIL-100 (Fe) and CNTs by 4.08 and 10.63&#xa0;times, respectively. The enhanced activity was attributed to efficient electron transfer from MIL-100 (Fe) to CNTs, which suppressed charge recombination and promoted •O<sub>2</sub><sup>−</sup> generation. Furthermore, density functional theory (DFT) calculations reveal that the synergistic adsorption energies of MFC-15 (− 1.53&#xa0;eV for LOMH and − 1.38&#xa0;eV for O<sub>2</sub>) and Bader charge transfer (1.018&#xa0;e) are both enhanced, further confirming that the composite system strengthens the adsorption and charge transfer of LOMH and O<sub>2</sub>. This work provides an effective strategy for antibiotic removal using Fe-based MOFs composite photocatalysts.</p>

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MIL-100 (Fe)/CNTs composites for enhanced photocatalytic oxidative degradation of lomefloxacin

  • 期刊论文

  • 发表日期：

    2026年7月28日

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  • Yuanting Deng,
  • Wei Liu,
  • Jin Zhang,
  • Xueyi Xie,
  • Xinye Leng

摘要

In this work, a facilely synthesized MIL-100 (Fe)/CNTs composite photocatalyst was developed for the efficient degradation of lomefloxacin (LOMH). Results from UV-vis diffuse reflectance spectroscopy, photoluminescence spectroscopy, and electrochemical tests indicate that the composite has a smaller bandgap of 1.70 eV and exhibits better photogenerated carrier separation performance. After 60 min of LED irradiation, the optimal MFC-15 (1 g/L) degraded 88.3% of LOMH with an initial concentration of 0.02 g/L. Its apparent reaction rate constant (3.56 × 10−2 min−1) outperformed pristine MIL-100 (Fe) and CNTs by 4.08 and 10.63 times, respectively. The enhanced activity was attributed to efficient electron transfer from MIL-100 (Fe) to CNTs, which suppressed charge recombination and promoted •O2− generation. Furthermore, density functional theory (DFT) calculations reveal that the synergistic adsorption energies of MFC-15 (− 1.53 eV for LOMH and − 1.38 eV for O2) and Bader charge transfer (1.018 e) are both enhanced, further confirming that the composite system strengthens the adsorption and charge transfer of LOMH and O2. This work provides an effective strategy for antibiotic removal using Fe-based MOFs composite photocatalysts.