Fig. 1. (a) XRD patterns and (b) FT-IR spectra of BC and MnFe₂O₄–BC; (c) FESEM image of BC (inset: EDX spectrum of BC); (d) FESEM image of MnFe₂O₄–BC (inset: EDX spectrum of MnFe₂O₄–BC); (e) nitrogen adsorption–desorption isotherms of BC and MnFe₂O₄–BC; and (f) pore size distributions of BC and MnFe₂O₄–BC.