Synthesis and Magnetic Properties of a Superparamagnetic Nanocomposite “Pectin‐Magnetite Nanocomposite”

Abstract

Magnetic nanocomposites composed of superparamagnetic magnetite nanoparticles in a pectin matrix were synthesized by an in situ coprecipitation method. The pectin matrix acted as a stabilizer and size control host for the magnetite nanoparticles (MNPs) ensuring particle size homogeneity. The effects of the different reactant ratios and nanocomposite drying conditions on the magnetic properties were investigated. The nanocomposites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), Fourier-transform infrared (FT-IR) spectroscopy, and superconducting quantum interference device magnetometer (SQUID). Superparamagnetic magnetite nanoparticles with mean diameters of 9 and 13 nm were obtained, and the freeze-dried nanocomposites had a saturation magnetization of 54 and 53 emu/g, respectively.

Facile synthesis of pectin-stabilized magnetic graphene oxide Prussian blue nanocomposites for selective cesium removal from aqueous solution

“…The pectin coating on the MPB nanocomposite enhanced the stability of magnetite in the MPPB nanocomposite. Similar results for stabilization of magnetite by pectin were observed by previous research of Namanga et al, (2013). Finally, the MPB nanocomposite image showed irregular round sphere-shaped nanoscale materials.…”

“…The increased adsorption efficiency of PSMGPB nanocomposites was attributed to the pectinstabilized separation of graphene oxide sheets and the enhanced distribution of magnetites on the graphene oxide surface. The stabilization of graphene oxide sheets using pectin, and the magnetite distribution were reported previously (Devasenathipathy et al, 2014;Ngenefeme et al, 2013;Namanga et al, 2013;Sahu and Dutta, 2011;Zakharova et al, 2012). Additionally, the presence of functional groups, such as hydroxyl (AOH) and carboxyl (ACOOH), from graphene oxide sheets and pectin enables Prussian blue attachment that leads to enhanced adsorption capacity in PSMGPB nanocomposites.…”

Anchoring Fe3O4 nanoparticles in a reduced graphene oxide aerogel matrix via polydopamine coating

“…The agglomeration of magnetic nanoparticles has a direct effect on any measurement performed on NPs when extracting quantitative parameters, such as, e.g., the magnetic moment value [66]. The interparticle distance affects the saturation magnetization of magnetic nanoparticles, as the strength of the magnetic moment interaction depends on the interparticle distance [67]. Therefore, the compression of nanoparticles in the c-rGO-PDA@Fe 3 O 4 aerogel sample led to the increase of the saturation magnetization.…”

Functionalized Magnetic Nanoparticles and Their Effect on Escherichia coli and Staphylococcus aureus

“…Surface functionalized magnetic nanoparticles have been widely used in a range of biological applications [1][2][3]. Magnetite (Fe 3 O 4 ) is easily degradable and is useful, therefore, in bioseparation and catalytic processes.…”