One-pot synthesis of Au–Fe2O3@SiO2 core–shell nanoreactors for CO oxidation

Abstract

Core–shell nanostructured Au–Fe₂O₃@SiO₂ nanoreactors with 3–4 nm Au–Fe₂O₃ cores and microporous SiO₂ shells were prepared by a water-in-oil (W/O) microemulsion method. In comparison with Au@SiO₂, the obtained Au–Fe₂O₃@SiO₂ nanoreactors showed a significant improvement in CO oxidation due to the strong interactions between Au and Fe₂O₃ in the cores.