Efficient Photo-Fenton Degradation of Eosin Yellow with Solvent-Free Synthesized Fe₃O₄/MIL-100(Cr)

Fe₃O₄/MIL-100(Cr) composites, designed to withstand chemical challenges, were effortlessly synthesized using an innovative mechanochemical approach free from hydrogen fluoride. In a groundbreaking step, we adorned MIL-100(Cr) with Fe₃O₄in-situ to explore its ability to degrade Eosin Yellow (EY) through the photo-Fenton process. Our analyses using PXRD and FT-IR revealed no alterations in the fundamental structure of MIL-100(Cr) upon Fe₃O₄ modification. However, the addition of this metal oxide led to a reduction in MIL-100(Cr)’s BET surface area, volume, and pore diameter. Fascinatingly, our FESEM-EDX studies revealed a uniform distribution of Fe₃O₄ within the MIL-100(Cr) matrix. Among our synthesized composites, the 20% Fe₃O₄/MIL-100(Cr) blend exhibited remarkable photo-Fenton activity, achieving an impressive 93.31% EY degradation within 150 min under optimal conditions employing a Hg lamp. The synergy between the composite, hydrogen peroxide, and light in the photo-Fenton system emerged as the primary driving force behind the enhanced removal of EY, transforming it into harmless CO₂ and H₂O under mild reaction conditions.