Using NMR techniques, the surface coating of the clusters was also analyzed. It was found that the coating consists of a variety of molecules, not just the stabilizer added in the reaction. By varying the temperature, it was possible to produce maghemite clusters instead of magnetite ones. ...
Using NMR techniques, the surface coating of the clusters was also analyzed. It was found that the coating consists of a variety of molecules, not just the stabilizer added in the reaction. By varying the temperature, it was possible to produce maghemite clusters instead of magnetite ones. ...
We fabricated magnetic nanofiber films by manufacturing the nanoparticles with the polyol process followed by the electrospinning process to combine them into a thin film. The magnetite Fe3O4 nanoparticles with mean crystallite size of 6–8 nm were synthesized through reduction of iron II acetate in...
摘要: Cu seeds are used to direct the epitaxial growth of Ni shell to form Cu-Ni core-shell cubes, tetrahexahedrons and nanowires. The controllable epitaxial growth of Ni shell on Cu core provides selectively exposed surfaces and morphologies as well as tunable magnetic properties....
One of popular methods for synthes- izing graphene supported metal NPs catalysts is the chemical reduction of metal salts in the presence of graphene oxide (GO) in aqueous solution14–17. Using this method, metal NPs usually have broader distributions in size and shape on the graphene surface....
Reduction of magnetite to metallic iron: Morphology of ammonia synthesis catalyst An ammonia synthesis catalyst, fabricated by reducing magnetite (Fe3O4) containing small amounts of Al2O3, CaO and K2O, was studied using transmission electron microscopy. It is observed that the Fe3O4 crystal grai...
GO was prepared using the Hummers’ Method and by oxidation of graphite. First, 0.2 g graphite was mixed with concentrated H2SO4(50 ml) and then stirred for 12 h. Subsequently, the mixture was cooled in an ice bath under vigorous stirring, and at the same time, KMnO4(2.5 g) was added...
Core-shell ZnO/y-Fe_2O_3 nanoparticles were prepared via a simple method using forced hydrolysis of acetate metallic salts in a polyol medium. Two types of morphologies can be easily obtained: (ⅰ) quasi-spherical ZnO core 20 ran in diameter coated with a continuous shell with...
Szymańska et al. (Szymańska et al.2024) proposed a fast and efficient method for synthesising a library of organo-functional alkoxysilanes using an amine-catalyzed thiol-isocyanate click reaction. The thiol-ene reaction produced new thiols and thioacetates, which were then reduced to thiols. ...
Magnetization curves of AF, DF and GF at 300 K Full size image Antimicrobial activity Antibacterial activity of iron oxide nanoparticles was analyzed using well diffusion method against selected bacterial species. Bacterial inoculums were prepared by growing a single colony overnight in nutrient broth ...