Electrostatic self-assembly synthesized Fe-MOF/g-C

Water-borne organic pollutants pose severe threats to human health, driving urgent demand for cost-effective, high-efficiency photocatalysts. In this work, a novel S-scheme heterojunction Fe-MOF/g-C3N4 photocatalyst is prepared through facile self-assembly. The porous composite exhibits a specific surface area of 97.414 m2 g-1, providing abundant active sites. The optimized MCN3-10 composite (Fe-MOF : g-C3N4 = 3 : 10) demonstrates exceptional activity, achieving 99% rhodamine B (RhB) degradation under xenon lamp irradiation within 40 minutes. Its first-order rate constant (120.33 × 10-3 min-1) represents 33.9-fold and 2.5-fold enhancements over pristine Fe-MOF and g-C3N4, respectively. The superior performance originates from the S-scheme heterojunction, which simultaneously enhances redox capabilities and facilitates efficient charge carrier separation, resulting in the production of abundant reactive species for pollutant degradation.