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<p>Iron-based metal–organic frameworks (Fe-MOFs) are considered as promising heterogeneous Fenton photocatalysts, yet some conditions—increased acidity/basicity, the presence of reactive oxygen species (ROS), etc. may cause their destruction. In this work: Chemical stability of Fe-MOFs is assessed by testing composite photocatalysts Fe<sub>3</sub>O<sub>4</sub>/γ-Fe<sub>2</sub>O<sub>3</sub>–MIL-88b(Fe), Fe<sub>3</sub>O<sub>4</sub>/γ-Fe<sub>2</sub>O<sub>3</sub>–NH<sub>2</sub>-MIL-88b(Fe) and running DFT calculations; Heterogeneous mechanism for ROS generation is explored to confirm photocatalytic reduction of iron centers to Fe<sup>2+</sup>; ROS generation is found to gradually shift from heterogeneous to homogeneous mechanism along with Fe-MOFs destruction and release of Fe<sup>2+</sup> ions by ROS.</p> Graphical abstract <p></p>

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Interconnection between chemical stability of Fe3O4/γ-Fe2O3–MIL-88b(Fe) and Fe3O4/γ-Fe2O3–NH2-MIL-88b(Fe) composites and formation of reactive oxygen species

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • V. L. Sidorov,
  • R. K. Baimuratova,
  • K. V. Bozhenko,
  • A. N. Utenyshev,
  • G. I. Dzhardimalieva,
  • S. M. Aldoshin

摘要

Iron-based metal–organic frameworks (Fe-MOFs) are considered as promising heterogeneous Fenton photocatalysts, yet some conditions—increased acidity/basicity, the presence of reactive oxygen species (ROS), etc. may cause their destruction. In this work: Chemical stability of Fe-MOFs is assessed by testing composite photocatalysts Fe3O4/γ-Fe2O3–MIL-88b(Fe), Fe3O4/γ-Fe2O3–NH2-MIL-88b(Fe) and running DFT calculations; Heterogeneous mechanism for ROS generation is explored to confirm photocatalytic reduction of iron centers to Fe2+; ROS generation is found to gradually shift from heterogeneous to homogeneous mechanism along with Fe-MOFs destruction and release of Fe2+ ions by ROS.

Graphical abstract