Facile Method for Synthesis of Fe₃O₄@Polymer Microspheres and Their Application As Magnetic Support for Loading Metal Nanoparticles

Abstract

A general method was developed for the synthesis of Fe 3 O 4 @polymer microspheres with well-defined coreÀ shell structure and various functional groups and strong magnetization through a facile in situ distillationÀprecipitation polymerization. In this approach, the as-prepared Fe 3 O 4 microspheres were directly coated by a polymer shell through the hydrogen bond interaction between the Fe 3 O 4 micropsheres and oligomer without any surface modification. Moreover, hydrophilic or hydrophobic monomer or even their comonomers with different functional groups such as carboxyl, hydroxyl, amide, and ester were facilely encapsulated onto the surface of the magnetite microspheres. The thickness of the polymer shell layer was tuned by the feed of monomer amount. As for application, Fe 3 O 4 @P(MBAAm-co-MAA) microspheres that contained carboxyl groups were used as a magnetic catalyst support to load a series of metallic nanoparticles such as Ag, Pt, and Au. These strong magnetic microspheres were characterized by transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectra, thermogravimetric analysis, and vibrating sample magnetometry.

Facile method for large scale synthesis of magnetic inorganic–organic hybrid anisotropic Janus particles

“…2A-b exhibited a new absorption peak at 594 cm À1 , which was assigned to the Fe-O group in the magnetic domain [26], demonstrating the formation of the iron oxide. The structure of the inorganic part of the hybrid anisotropic Janus particles was studied by XRD as shown in Fig.…”

Fabrication of Epoxide Functional Hydrophobic Composite Polymer Particles by Suspension Polymerization and Subsequent Doping with Fe³O⁴ Nanoparticles

“…The interaction of epoxide ring on the surface of P(LMA-DVB)/PGMA composite polymer particles was followed by coordination with Fe 3 O 4 nanoparticles [13]. The formation of hydrogen bond between hydroxyl groups on the surface of iron oxide and ester groups of PGMA can also induce strong fixation of nanoparticles [28,29]. for iron oxide nanoparticles at 30.3°, 35.6°, 43.5°, 54.0°, 56.6° and 62.46° which can be assigned to (220), (311), (400), (422), (511) and (440) respectively according to the database of magnetite cited in JCPDS-International Centre (JCPDS Card: 19-0629) [32].…”

Controlled synthesis of 2,4,6-trichlorophenol-imprinted amino-functionalized nano-Fe3O4-polymer magnetic composite for highly selective adsorption

“…All the size data reflect the averages of about 100 particles and are calculated according to Eq. 9 [25]:…”