FeS2/SiO2 mesoporous hollow spheres formation and catalytic properties in the Fenton reaction

Transition metal sulfides (TMSs) show excellent catalytic activity in the Fenton reaction. However, the metal ion in TMSs always leached in solution during the reaction, which induced the second pollution. At present, mesoporous hollow spherical FeS2/SiO2 composite was synthesized, which the FeS2 particles were deposited at the inner wall of SiO2 hollow spheres. The composite exhibited higher adsorption capacity and catalytic activity for rhodamine B (RhB) degradation in the Fenton reaction than FeS2. The Fe ionic concentration leashed from the composite is smaller about 24-fold than the FeS2. This method provides a possible solution for the stable TMSs formation as catalysts in the Fenton reaction.