This research investigates the synthesis and application of a novel composite photocatalyst, Mg0.75Ce0.25Fe12O19@ZIF-67, for the degradation of Rhodamine B (RhB) dye under sunlight irradiation. The study involves the preparation of Mg0.75Ce0.25Fe12O19 and ZIF-67 frameworks, followed by the fabrication of the composite catalyst. Characterization techniques such as XRD, SEM, EDX, and FTIR were used to assess the structural, morphological, and compositional properties of the materials. Photocatalytic experiments demonstrated a significant enhancement in degradation efficiency (90%) compared to individual components. The effects of catalyst type, dosage, and pH on the degradation process were systematically investigated. The proposed mechanism highlights the role of the Mg0.75Ce0.25Fe12O19@ZIF-67 cocatalyst in generating radicals, which are key contributors to the degradation process. The research underscores the importance of efficient water treatment and the potential of advanced oxidation processes (AOPs) in removing micropollutants.This research investigates the synthesis and application of a novel composite photocatalyst, Mg0.75Ce0.25Fe12O19@ZIF-67, for the degradation of Rhodamine B (RhB) dye under sunlight irradiation. The study involves the preparation of Mg0.75Ce0.25Fe12O19 and ZIF-67 frameworks, followed by the fabrication of the composite catalyst. Characterization techniques such as XRD, SEM, EDX, and FTIR were used to assess the structural, morphological, and compositional properties of the materials. Photocatalytic experiments demonstrated a significant enhancement in degradation efficiency (90%) compared to individual components. The effects of catalyst type, dosage, and pH on the degradation process were systematically investigated. The proposed mechanism highlights the role of the Mg0.75Ce0.25Fe12O19@ZIF-67 cocatalyst in generating radicals, which are key contributors to the degradation process. The research underscores the importance of efficient water treatment and the potential of advanced oxidation processes (AOPs) in removing micropollutants.