Characterization of magnetite nanoparticles supported in sulfonated styrene-divinylbenzene mesoporous copolymer

Abstract

The chemical co-precipitation process was used to synthesize (in situ) spherical iron-oxide nanoparticle in sulfonated styrene-divinylbenzene polymeric template. X-ray diffraction technique supports the magnetite phase formation with a mean particle diameter of about 19 nm. The analysis of Mössbauer spectra is consistent with two magnetic splitting patterns assigned to A-and B-iron sites of magnetite, with no visible magnetic relaxation effect even at 297 K. Considering the different experimental time window between Mössbauer spectroscopy and DC magnetization, the results obtained from both techniques are in very good agreement. Magnetic data suggest hosting magnetite nanoparticles interacting antiferromagnetically.

Magnetic nanocomposites based on phosphorus-containing polymers—structural characterization and thermal analysis

“…For this purpose ion exchange of iron ions by cross-linked sulfonated porous polystyrene was carried out followed by precipitation of iron oxide NPs in a polymer matrix. This method was then applied to obtain MNCs based on cross-linked polymers such as anions and cations exchangers [31][32][33][34][35] as well as macromolecular oxidizers [36] that have numerous environmental applications. For example, the sorption properties of the synthesize MPCs for the oxyanions of arsenic [31], Cu 2+ , Zn 2+ [32], and sulfide [33] have been investigated.…”