Ellipsoidal hollow nanostructures assembled from anatase TiO2 nanosheets as a magnetically separable photocatalyst

A simple approach was proposed to synthesize three types of ellipsoidal hollow nanostructures whose shells are assembled from anatase TiO2 nanosheets (NSs) with exposed (001) facets. Among them, ellipsoid Fe3O4@TiO2-NS nanorattles can be readily generated as a magnetically separable photocatalyst with enhanced activity through in situ reduction of the alpha-Fe2O3 core.