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Synthesis and Characterization of CoFe 2 O 4 Hollow Spheres
Author(s) -
Meng Yongde,
Chen Dairong,
Jiao Xiuling
Publication year - 2008
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200800432
Subject(s) - coercivity , chemistry , calcination , spinel , aqueous solution , cobalt , nanoparticle , ammonium sulfate , nuclear chemistry , hydrothermal circulation , hydrothermal synthesis , sulfate , characterization (materials science) , spheres , magnetization , chemical engineering , nanotechnology , crystallography , inorganic chemistry , metallurgy , materials science , organic chemistry , magnetic field , condensed matter physics , physics , quantum mechanics , astronomy , engineering , catalysis
Abstract CoFe 2 O 4 hollow spheres with sizes ranging from 600 nm to 1 μm were prepared through hydrothermal treatment of an aqueous solution containing glucose, ammonium iron(II) sulfate hexahydrate [(NH 4 ) 2 Fe(SO 4 ) 2 · 6H 2 O], and cobalt(II) sulfate heptahydrate [CoSO 4 · 7H 2 O], followed by calcination. The wall of the CoFe 2 O 4 hollow spheres is composed of CoFe 2 O 4 spinel nanoparticles with a size of ca. 30 nm and wall thickness of ca. 150 nm. Magnetic characterization indicates high coercivity and low saturation magnetization, which indicate potential applications as high‐density magnetic recording materials and drug carriers.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)