Research Article
Performance of NiFe2O4-SiO2-TiO2 Magnetic Photocatalyst for the Effective Photocatalytic Reduction of Cr(VI) in Aqueous Solutions
Figure 4
SEM images of (a) NiFe2O4-SiO2, (b) TiO2, (c) NiFe2O4-TiO2, and (d) NiFe2O4-SiO2-TiO2 at the same magnification.
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