A representative plot of N2 adsorption isotherms for the magnetic PGMA, PGMA/PDVB IPNs and PMADETA/PDVB IPNs GDC-0941 illustrated in Fig. 2(b). The N2 adsorption capacity on the magnetic PMADETA/PDVB IPNs increases in comparison with its precursors, which agrees with the data of BET surface area and pore volume. Actually, as shown in Table S1, the BET surface area and pore volume of the magnetic PGMA are measured to be 146.7 m2/g and 0.227 cm3/g, respectively, while PGMA/PDVB IPNs has a much increased BET surface area (240.9 m2/g) and pore volume (0.601 cm3/g). Moreover, after the amination reaction, the BET surface area and pore volume of the magnetic PMADETA/PDVB IPNs further increase to 245.7 m2/g and 0.709 cm3/g, respectively. According to the N2 adsorption isotherm, the pore diameter distributions are plotted in Fig. 2(c). It is interesting to observe amniocentesis the shape of pore diameter distribution of the magnetic PGMA/PDVB IPNs and PMADETA/PDVB IPNs is quite different from that of PGMA, and mesopores are the predominant pores for the magnetic PGMA/PDVB IPNs and PMADETA/PDVB IPNs. The TEM image of the magnetic PMADETA/PDVB IPNs (Fig. 3) indicates that Fe3O4 nanoparticles are incorporated successfully and the saturation magnetization of the magnetic PMADETA/PDVB IPNs was measured to be 1.39 emu/g (Fig. 2(d)).