Synthesis of hollow ferrite nanospheres for biomedical applications

Fabrication, characterization, and magnetic behavior of porous ZnFe2O4 hollow microspheres

“…In the past, various methodologies have been adopted for the preparation of hollow spheres [8][9][10][11][12]. However, the main process for the preparation of hollow spheres generally requires removable templates such as monodispersed silica, polystyrene latex spheres, metal nanoparticles, gas bubbles, and polymer spheres followed by sequential adsorption of magnetic nanoparticles on the templates [13][14][15][16][17][18]. The typical procedure is that the template is coated by either direct surface reaction utilizing special functional groups on the core or controlled precipitation of inorganic precursors on the surface of template to induce coating, followed by the removal of template core through calcination or solvent dissolution [19][20][21].…”

Size-controlled synthesis and magnetic properties of NiFe2O4 hollow nanospheres via a gel-assistant hydrothermal route

“…For instance, Chen and his coworkers demonstrated the preparation of CoFe 2 O 4 hollow spheres by hydrothermal reaction of a solution of metal oxide precursors and glucose, followed by calcination [15]. Tada et al reported the synthesis of hollow ferrite nanospheres with diameter of 220-340 nm by depositing ferrite shell layers on the surfaces of silica spheres by oxidation of Fe 2+ using NaNO 3 as an oxidizing agent in solution [16]. Xia's group investigated the synthesis of LiMn 2 O 4 hollow nanospheres by air-calcining lithiated MnO 2 precursor at a low temperature of 550 • C, which was synthesized by chemical lithi- ation of hollow MnO 2 nanospheres with LiI at 70 • C for 12 h [17].…”

Synthesis of Spinel MgFe2O4 Ferrite Material and Studying its Structural and Morphological Properties Using Solid State Method

“…It is well known as soft magnetic n-type semi conductive material, with high resistivity and low magnetic and dielectric losses. Among various ferrites, magnesium ferrite (MgFe 2 O 4 ) enjoys a special attention because of its vast applications such as one of the candidates for high density magnetic recording [4][5][6][7][8] , microwave absorbents, sensors and electronic device, high frequency devices, color imaging 9-11 and fabrication of radio frequency coils, transformer cores and chock coils, noise filters, recording heading and rod antennas 12,13 . Magnesium ferrites are the potential materials for various applications due to their high electrical resistivity, low magnetic and dielectric losses 14,15 .…”