Figure 3
From: Corn-like, recoverable γ-Fe2O3@SiO2@TiO2 photocatalyst induced by magnetic dipole interactions

Typical SEM images of Fe3O4 microspheres synthesized with different surfactants: (a) ED, (b) PEG, (c) NaPAA, and (d)–(f) γ-Fe2O3@SiO2@TiO2 corn-like heterostructures under different magnifications.