Fe⁰ nanoparticles encapsulated in hollow porous nanosphere frameworks for efficient degradation of methyl orange

In this work, we report a synthesis of Fe⁰ nanoparticles encapsulated in hollow porous nanosphere frameworks (CS/YS-Fe@HPNFs) with core/yolk−shell structure by combining hyper-cross-linking mediated self-assembly method and impregnation reduction technology. By introducing carefully the iron precursor (FeSO₄) into the cavity of hollow nanospheres, the CS/YS-Fe@HPNFs with a micro/mesoporous structure and the high surface area can be easily obtained. Owing to the effective protection of porous organic nanosphere and high activity of nano-Fe⁰, the resulting YS-Fe@HPNFs nanocomposites exhibit excellent degradation ability and the good cyclic performance for typical organic dye such as Methyl orange (MO). Therefore, YS-Fe@HPNFs composite can be used as an effective functional material for treating wastewater containing organic dyes in the future.