Abstract
In this study, metal chlorides (MnCl2 and MgCl2·6H2O) and p-phthalic acid (PTA) were utilized as raw materials for the production of Mn3O4/Mg(OH)2 doped activated carbon (AC) through a one-step cationic membrane electroconversion method (CM), resulting in the formation of Mn3O4/Mg(OH)2/AC-MOF (MMOHPC) material. The microstructure and surface properties of the composites were characterized using X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and infrared spectroscopy (FTIR). The photo-Fenton activity of the heterojunctions was evaluated by studying the photodegradation of methylene blue (MB) dye under simulated sunlight. The results showed that the composites exhibited excellent synergistic properties due to the enhancement of the machine-framework materials. Under simulated sunlight, the addition of 0.3 g/L MnMg-MOF catalyst and 10 mg/L H2O2 at an initial concentration of 10 mg/L MB resulted in a decolorization rate of 87.79 % after 180 min. Furthermore, the TOC removal rate of MB was found to be 88 % after three photocatalytic cycles. The reaction process of the photocatalytic degradation of MB was analyzed by comparing the adsorption experiments conducted in the dark with the photo-Fenton experiments conducted without H2O2, and the degradation mechanism was discussed.
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