Solvothermal Synthesis of Mesoporous Fe{sub 3}O{sub 4} Nanoparticles in Mixed Solvent of Ethylene Glycol and Water: Structure and Magnetic Properties
- Shenyang University of Chemical Technology, College of Chemical Engineering (China)
Mesoporous Fe{sub 3}O{sub 4} nanoparticles were synthesized by a solvothermal method, via a mixed solvent of ethylene glycol (EG) and deionized water, using iron chloride and urea as the precursors. The phase, morphology, and pore structure are investigated by the characterization of X-ray diffraction (XRD), transmission electron microscopy (TEM), and N{sub 2} isotherm adsorption–desorption. The results show that the amount of water in the mixed solvent plays vital role in controlling the size of Fe{sub 3}O{sub 4} nanoparticles, specific surface area, and pore size. Additionally, solid Fe{sub 3}O{sub 4} nanospheres were prepared using only EG as solvent, while α-Fe{sub 2}O{sub 3} nanosized polyhedrals were obtained with only water as solvent. The mesoporous Fe{sub 3}O{sub 4} nanoparticles show a ferromagnetic behavior, with saturation magnetizations (Ms) of 78–82 emu g{sup − 1} and coercivities (Hc) ranging from 13–58 Oe. The α-Fe{sub 2}O{sub 3} nanoparticles also exhibit a weak-ferrimagnetic character, with a remanent magnetization (Mr) of 0.24 emu g{sup − 1}, and Hc of 558 Oe.
- OSTI ID:
- 22919558
- Journal Information:
- Journal of Superconductivity and Novel Magnetism, Vol. 32, Issue 3; Other Information: Copyright (c) 2019 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ADSORPTION
DESORPTION
ETHYLENE GLYCOLS
IRON CHLORIDES
IRON OXIDES
ISOTHERMS
MAGNETIC PROPERTIES
MAGNETIZATION
MIXED SOLVENTS
NANOPARTICLES
NANOSTRUCTURES
PORE STRUCTURE
SATURATION
SOLIDS
SPECIFIC SURFACE AREA
SYNTHESIS
TRANSMISSION ELECTRON MICROSCOPY
WATER
X-RAY DIFFRACTION