Figure 3

(a) FT-IR spectra of Fe3O4, PAMAM, Fe3O4@MOF and Fe3O4@MOF-PAMAM; (b) FT-IR spectra of Fe3O4@MOF-PAMAM sorbent before and after adsorption of MB; (c) VSM hysteresis curves of the magnetic nanoparticles.

(a) FT-IR spectra of Fe3O4, PAMAM, Fe3O4@MOF and Fe3O4@MOF-PAMAM; (b) FT-IR spectra of Fe3O4@MOF-PAMAM sorbent before and after adsorption of MB; (c) VSM hysteresis curves of the magnetic nanoparticles.