Synthesis and Characterization of Nontoxic Hollow Iron Oxide (-) Nanoparticles Using a Simple Hydrothermal Strategy

Figure 2

SEM images showing the hollow spheres of α-Fe₂O₃ at 12 h reaction time after calcination process: (a) dispersion in ethanol, (b) dispersion in water, (c) high magnification image of sphere showing α-Fe₂O₃ shell showing the inherent porosity, and (d) EDX mapping showing the Fe content.

(a)

(b)

(c)

(d)