Abstract
In this study, Ag/Fe3O4/graphene composites were used as catalysts for the removal of wastewater via the photo-Fenton reaction. The Ag/Fe3O4/graphene composites were successfully synthesized by the hydrothermal method. The Ag content was varied from 15 and 25 wt%. The structural properties of the samples were investigated by X-ray diffraction and Raman spectroscopy, and their magnetic properties were examined using a vibrating sample magnetometer. Structural analysis revealed the presence of an inverse-cubic spinel structure corresponding to Fe3O4. and a cubic structure corresponding to Ag. The presence of graphene was confirmed by the presence of the D- and G-bands at 1300 and 1500 cm−1 in the Raman spectra, respectively, and the magnetic properties of the samples indicated that Ag/Fe3O4/graphene exhibits a ferromagnetic behavior at room temperature. The photo-Fenton reaction was examined in terms of the degradation of methylene blue from an aqueous solution. Control experiments were carried out to investigate the effects of the H2O2, content and solution pH. The maximum degradation of methylene blue was observed with 4 mL of H2O2, and at pH 13, reflecting that Ag/Fe3O4/graphene composites demonstrate promise for wastewater removal via the photo-Fenton process.
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