Enhanced visible light photo ‐Fenton catalysis by Fe‐doping oligo‐layer natural molybdenite with efficient carrier spatial‐driven Fe3+/Fe2+ cycle

This study serves as a crucial reference for the advancement of photo-Fenton catalysts based on molybdenite in the treatment of organic wastewater. AbstractDeveloping cost-effective and efficient photo-Fenton catalysts is crucial for advancing photo-Fenton technology. MoS2 is a representative transition metal disulfide with attractive photoresponsiveness, making it ideal for preparing composite photo-Fenton catalysts. In this study, natural molybdenite was innovatively utilized as a source of MoS2 (OM) to synthesize a low-cost and efficient Fe@MoS2 (OMF) composite photo-Fenton catalyst by comminution and adsorption, which was then applied to the remediation of antibiotic-contaminated water. The OMF composites exhibited significant catalytic activity, with a kinetic rate constant of 0.022 min−1, which was 3.1 times higher than that of the original OM (0.007 min−1), indicating a 3% increase. This was attributed to the synergistic effect of many photogenerated electrons and reversible Mo4+/Mo6+ redox pairs, which accelerated the regeneration of Fe2+. After three cyclic tests, the concentrations of dissolved Fe2+ and Mo2+ ions remained below 0.38  mg/L and 0.17 mg/L, respectively. This indicates the high reusability of the catalyst in cyclic experiments. Ultimately, the main active species, •OH and •O2−, were generated during the photo-Fenton process, contributing significantly to TC degradation. This study may serve as a reference for the development and applicatio...
Source: Photochemistry and Photobiology - Category: Science Authors: Tags: RESEARCH ARTICLE Source Type: research