In this work, MAGNETIC Fe3O4@MCM-41/CuO nanocomposite was preparation of iron oxide magnetite nanoparticles and development of MCM-41 mesoporous SHELLs on the surface of iron oxide magnetite after Fe3O4@MCM-41 was organofunctionalized and finally formation CuO SHELLs with thickness ~ 25-30 nm in the surface of Fe3O4@MCM-41-NH2 CORE-SHELL. The properties of prepared MAGNETIC CORE-SHELL were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), nitrogen adsorption– desorption measurement and vibration sample magnetometer (VSM). The applicability of the synthesized CORE-SHELL was tested as an antimicrobial agent against gram-positive and gram-negative bacteria. It was showed that the Fe3O4@MCM-41@CuO act as an ideal antimicrobial agent in compared with that of the pure copper oxide and Fe3O4@CuO.

In this paper, a kind of CORE-SHELL MAGNETIC mesoporous microspheres of Fe3O4@SiO2@meso-SiO2 with high surface area was prepared, where MAGNETIC Fe3O4 nanospheres were used as the inner CORE, tetraethyl orthosilicate (TEOS) as silica source, and cetyltrimethylamonium bromide (CTAB) as pore forming agent. Methanol-enhanced supercritical CO2 extraction has been attempted on structurally order mesoporous SHELL to remove the cationic template of CTAB and the effects of operating conditions i.e. pressure and temperature on the extraction efficiency were investigated. The influence of the methanol-enhanced supercritical CO2 on the structural properties of MAGNETIC mesoporous silica nanocomposites was examined in detail by means of FE-SEM, FTIR, XRD, N2 adsorption/desorption and VSM. The obtained results reflected that the methanol-enhanced supercritical CO2 extraction had well preserved the structural stability of Fe3O4@SiO2@meso-SiO2 with high surface area ca. 569 m2/g. The strong magnetization value (60 emu/ g) of the CORE-SHELL particles suggests their suitability for MAGNETIC separation in a short time.

In this work, the first synthesis, characterization and catalytic performance of Fe3O4/camphor CORE/SHELL nanospheres as a MAGNETIC composite nanocatalyst were reported. The characterization was carried out by Fourier transform infrared spectroscopy, field-emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy, thermogravimetric analysis, vibrating sample magnetometer, N2 adsorption–desorption by Brunauer–Emmett–Teller and inductively coupled plasma analyses. The recoverable heterogeneous nanostructure catalyst was simply prepared and effectively employed in the one-pot multicomponent synthesis of b-amino carbonyl compounds in ethanol as a green solvent at room temperature. Further advantages of this new protocol are short reaction times, high yields, easy workup procedure, inexpensive and eco-friendly protocol and MAGNETICally recoverability and several times reusability of the nanocatalyst without significant decrease in catalytic activity.

Cobalt ferrite nanoparticles (CoFe2O4) are well known for some distinctive characteristics such as high MAGNETIC permeability and coercive force, good saturation magnetization, excellent physical, and chemical stability, which make them so attractive for MAGNETIC storage, MAGNETIC resonance imaging (MRI), drug delivery, optical-MAGNETIC equipment, radar absorbing materials (RAM), and MAGNETIC hyperthermia applications. According to these particularities, cobalt ferrite-based CORESHELL nanoparticles have been reviewed focusing on hyperthermia applications. Promoting anisotropic constant and MAGNETIC permeability, increasing the chemical and physical stability of nanoparticles, the proper distribution of particles in aquatic environments to prevent agglomeration, sedimentation, and obstruction in a specific position, as well as enhancing biocompatibility and avoiding the disadvantages, are essential for better efficiency in hyperthermia aspect. For this purpose, the synthesis of MAGNETIC nanoparticles of cobalt ferrite with preferentially smaller sizes, as well as a narrower range of particle size distribution, is the primary objective of the synthesis process. Hence, it is important to identify the influence of effective parameters on the size and shape of nanoparticles, the substitution mechanisms of rare-earth elements, and changing the structure and behavior of the MAGNETIC properties by these elements and finally, the thermal properties. Moreover, surface modifications and coating are other significant parameters in hyperthermia field that are investigated to achieve a suitable and stable distribution in aqueous media, and how they behave against the MAGNETIC field.