Experimental Study of PMS Activation for RhB Degradation Using MIL/BWO Photocatalyst

To efficiently degrade Rhodamine B (RhB), an MIL/BWO photocatalyst was prepared using a hydrothermal-solvothermal method. Its morphological structure and chemical composition were characterized and analyzed by SEM, XRD, FTIR, and XPS. The performance of MIL/BWO in activating peroxymonosulfate (PMS) for RhB degradation under visible light was also investigated. Under optimal reaction conditions—pH 3.29, PMS dosage of 4.11 mmol/L, MIL/BWO dosage of 1.59 g/L, stirring speed of 300 rpm, and reaction time of 60 min—the color and COD removal rates of an RhB aqueous solution (initial color 736 times and COD 134 mg/L) reached 92.47% and 71.19%, respectively. Furthermore, after five reuse cycles, MIL/BWO maintained color and COD removal rates of 85.28% and 63.35%, respectively, demonstrating excellent structural stability and reusability. This study presents a novel strategy for the efficient and stable degradation of RhB, with significant potential for practical applications.