Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 708, Issue -, Pages 278-284Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.02.268
Keywords
Magnetite; Cobalt ferrite; Mesoporous silica coated magnetite; Mesoporous silica coated cobalt ferrite; Superparamagnetic composite materials
Categories
Funding
- Romanian project PCCA [131/2012]
- Ministry of European Funds [POSDRU 187/1.5/S/155420]
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Ferrite-based composite materials have many applications in biomedicine, catalysis, magnetic separations etc. Cobalt ferrite and magnetite were synthesized by co-precipitation method using oleic acid as capping agent. The crystalline CoFe2O4 nanoparticles with an average size of 12 nm were obtained at 90 degrees C. The magnetic composite materials were prepared by coating the magnetic nanoparticles with MCM-41 mesoporous silica. Fe3O4 nanoparticles and magnetite-based composites presented super-paramagnetic behavior, while CoFe2O4 and silica coated cobalt ferrite material exhibited ferrimagnetic properties. The obtained composites had high specific surface area values in the range of 612-784 m(2)/g and no significant in vitro toxicity on adherent epithelial opossum kidney cells that recommend them as platform for drug delivery systems. (C) 2017 Elsevier B.V. All rights reserved.
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