323145.fig.002a
(a)
323145.fig.002b
(b)
Figure 2: (a) IR and (b) UV-vis spectra of as-prepared CoFe2O4–Fe3O4 magnetic nanocomposites. Inset: Plot of ( 𝛼 𝜐 )2 versus 𝜐 to determine the band gap energy using Tauc relation [18].