Figure 4

FE-SEM images of CuFe2O4 (a), CuFe2O4/SiO2–Cl (b), CuFe2O4 @ SiO2-phenylenediamine (c), CuFe2O4@SiO2-polymer nanostructure (d, e) and EDX spectrum (f) of CuFe2O4@SiO2-polymer nanostructure.
FE-SEM images of CuFe2O4 (a), CuFe2O4/SiO2–Cl (b), CuFe2O4 @ SiO2-phenylenediamine (c), CuFe2O4@SiO2-polymer nanostructure (d, e) and EDX spectrum (f) of CuFe2O4@SiO2-polymer nanostructure.