Research Article

Preparation and Photocatalytic Activity of Magnetic Fe3O4/SiO2/TiO2 Composites

Figure 3

FE-SEM images of Fe3O4 (a) and Fe3O4/SiO2 (b) Fe3O4/SiO2/TiO2 composite microspheres (c, d).
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(a)
409379.fig.003b
(b)
409379.fig.003c
(c)
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(d)