Physico-magnetic properties and dynamics of magnetite (Fe3O4) nanoparticles (MNPs) under the effect of permanent magnetic fields in contaminated water treatment applications

Advancements in enzyme immobilization on magnetic nanomaterials: toward sustainable industrial applications

“…Among the supports, magnetite (Fe 3 O 4 ) stands out as the most widely used MNP for enzyme immobilization 189 because of its cost-effectiveness, biocompatibility, low toxicity, large surface area because of small particle size, high magnetic susceptibility, high saturation magnetization, and superparamagnetic properties at room temperature. 189,194,199,200 Consequently, immobilization of enzymes on MNPs signicantly improves stability, catalytic performance, and reusability compared to pure enzymes. 189,200,201 2.2.…”

Natural polyphenol tannin-immobilized composites: rational design and versatile applications

“…Magnetic nanoparticles (MNPs), in particular magnetite (Fe 3 O 4 ), are one of the most widely used nanomaterials for drug delivery, biosensing, and wastewater remediation applications. 194,195 Fe 3 O 4 can be prepared using various methods, including co-precipitation, 196,197 thermal decomposition and reduction, 198,199 and solvothermal reduction method, 200,201 the particle size and shape of which can be tailored to fit appropriate applications. Fe 3 O 4 nanoparticles are usually coated with compounds or functional groups to prevent their aggregation, oxidation, or further functionalization.…”

Synthesis of highly ordered L10 MPt alloys (M = Fe, Co, Ni) from crystalline salts: an in situ study of the pre-ordered precursor reduction strategy

“…Whether in the form of bulk, [1][2][3][4][5] thin films [6][7][8][9] or nanoparticles, [10][11][12][13] magnetic alloys play a fundamental role in many fields of application, such as data storage/processing, sensors, energy and catalysis, [14][15][16][17][18] being also of potential interest in other research areas, such as biomedicine and environment remediation, [19][20][21] where magnetic oxides are more commonly used. 19,20,[22][23][24] Among the family members, chemically ordered binary alloys are of significant interest due to their peculiar atomic arrangement, which results in unique and sometimes remarkable magnetic properties along with excellent chemical stability. 25 Paramount examples of chemically ordered compounds include: (i) Fe(Co)-Pt and Fe(Co)-Pd ferromagnetic alloys for data storage/processing and catalysis, which feature a huge uniaxial magnetic anisotropy (K = 0.5-1 Â 10 7 J m À3 ) 26 that can be intrinsically obtained without resorting to complex multilayered structures; [27][28][29] (ii) high-anisotropy Mn-Al and Fe-Ni alloys (K = 1-2 Â 10 6 J m À3 ) 30 that are cost-effective alternatives to materials containing critical elements for the development of sustainable permanent magnets and electronics; and (iii) antiferromagnetic alloys (e.g., Mn-Pt and Mn-Ni) for spintronic devices.…”