Transition metal-based MOFs for Fenton-like photocatalytic degradation of organic pollutants: Performance, stability, and biocompatibility

作者：S.M. Tikhanova, Yu. A. Tishchenko, E. Yu. Stovpiaga, Maria Timofeeva, D. V. Lipin, Svyatoslav A. Povarov, Valentin A. Milichko, Alexander S. Timin, Sergei A. Shipilovskikh, V.I. Popkov · 发表于：Environmental Chemistry and Ecotoxicology · 年份：2025 · DOI：10.1016/j.enceco.2025.01.003 · 被引用次数：16 · 研究领域：Advanced Photocatalysis Techniques、Metal-Organic Frameworks: Synthesis and Applications、Gas Sensing Nanomaterials and Sensors

The development of efficient materials for water treatment is crucial to addressing global environmental challenges. In this study, transition metal-based metal-organic frameworks (MeBDC MOFs; Me = Fe, Co, Ni; BDC = benzene dicarboxylic acid) were synthesized via a solvothermal method and considered as dual-function photocatalysts for adsorption and removal of organic pollutant. Comprehensive physicochemical analysis of the developed samples was performed using scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), energy-dispersive X-ray spectroscopy (EDX), fourier-transform infrared spectroscopy (FTIR), raman spectroscopy, N 2 adsorption-desorption isotherms (BET), and diffuse reflectance spectroscopy (DRS). The materials exhibited a high visible-light absorption with band gap energies of 1.76 eV (FeBDC), 3.08 eV (CoBDC), and 3.73 eV (NiBDC), BET surface areas of 28.2 m 2 /g (FeBDC), 74.3 m 2 /g (CoBDC), and 31.4 m 2 /g (NiBDC). Photocatalytic performance was evaluated using methylene blue (MB) degradation under visible-light irradiation containing both conventional and Fenton-like processes. FeBDC achieved a reaction rate constant of 0.2719 min −1 with 50 mmol/L H₂O₂, outperforming other materials due to its superior visible-light absorption and catalytic activity, which justified its selection for more detailed mechanistic studies. The proposed mechanism involves ligand-to-metal charge transfer (LMCT) and Fe-driven generation of reactive oxygen species (ROS)...