Fig. 3. (A) The transmission electron microscopy image of Fe3O4@SiO2@PIL-PF6; (B) The FT-IR spectra of Fe3O4 (a), Fe3O4@SiO2 (b), Fe3O4@SiO2@VTES (c). Fe3O4@SiO2@PIL-Br (d) Fe3O4@SiO2@PIL-PF6 (e); (C) XRD pattern of the Fe3O4 (a) and Fe3O4@SiO2@PIL-PF6 (b) nanoparticles; (D) Magnetic hysteresis loops of Fe3O4 (a) and Fe3O4@SiO2@PIL-PF6 (b).
