Sonochemical synthesis of monodispersed magnetite nanoparticles by using an ethanol-water mixed solvent.
The magnetite nanoparticles were synthesized in an ethanol-water solution under ultrasonic irradiation from a Fe(OH)(2) precipitate. XRD, TEM, TG, IR, VSM and UV/vis absorption spectrum were used to characterize the magnetite nanoparticles. It was found that the formation of magnetite was accelerated in ethanol-water solution in the presence of ultrasonic irradiation, whereas, it was limited in ethanol-water solution under mechanical stirring. The monodispersibility of magnetite particles was improved significantly through the sonochemical synthesis in ethanol-water solution. The magnetic properties were improved for the samples synthesized under ultrasonic irradiation. This would be attributed to high Fe(2+) concentration in the magnetite cubic structure.
Dang
Feng
F
Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan.
Enomoto
Naoya
N
Hojo
Junichi
J
Enpuku
Keiji
K
D000431:Ethanol / Q000737:chemistry*; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D010084:Oxidation-Reduction; D010316:Particle Size; D012997:Solvents / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013696:Temperature; D014465:Ultrasonics; D014867:Water / Q000737:chemistry*; D014961:X-Ray Diffraction
D012997:Solvents; D014867:Water; D000431:Ethanol; D052203:Ferrosoferric Oxide