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Cobalt-containing core-shell nanoparticles on the surface of poly(tetrafluoroethylene) microgranules

Yurkov, G. Yu ; Baranov, D. A. LU orcid ; Kozinkin, A. V. ; Koksharov, Yu A. ; Nedoseikina, T. I. ; Shvachko, O. V. ; Moksin, S. A. and Gubin, S. P. (2006) In Inorganic Materials 42(9). p.1012-1019
Abstract

Cobalt-containing nanoparticles have been prepared via thermal decomposition of cobalt acetate on the surface of poly(tetrafluoroethylene) (PTFE) microgranules forming a fluidized bed over the surface of hot mineral oil. Using transmission electron microscopy, the average size of the cobalt-containing nanoparticles has been determined to be 3.6 nm. The composition and structure of the nanoparticles have been determined by x-ray diffraction, extended x-ray absorption fine structure spectroscopy, and electron paramagnetic resonance, and the magnetic properties of the synthesized nanomaterial have been studied. The results indicate that the nanoparticles have a core-shell structure, with a metallic cobalt core (≲ 10 vol%) and a shell... (More)

Cobalt-containing nanoparticles have been prepared via thermal decomposition of cobalt acetate on the surface of poly(tetrafluoroethylene) (PTFE) microgranules forming a fluidized bed over the surface of hot mineral oil. Using transmission electron microscopy, the average size of the cobalt-containing nanoparticles has been determined to be 3.6 nm. The composition and structure of the nanoparticles have been determined by x-ray diffraction, extended x-ray absorption fine structure spectroscopy, and electron paramagnetic resonance, and the magnetic properties of the synthesized nanomaterial have been studied. The results indicate that the nanoparticles have a core-shell structure, with a metallic cobalt core (≲ 10 vol%) and a shell consisting of three phases: Co 3O 4 (≲ 80%) and small amounts of CoO and CoF 2 (≲ 10%). The fluoride phase results from the interaction of the nanoparticles with surface fluorine atoms of the PTFE microgranules.

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author
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publishing date
type
Contribution to journal
publication status
published
in
Inorganic Materials
volume
42
issue
9
pages
8 pages
publisher
Pleiades Publishing
external identifiers
  • scopus:33749420946
ISSN
0020-1685
DOI
10.1134/S0020168506090159
language
English
LU publication?
no
id
724b035f-de4c-4c51-8b15-89f6d85d3dfb
date added to LUP
2023-01-20 21:24:54
date last changed
2023-02-15 02:41:25
@article{724b035f-de4c-4c51-8b15-89f6d85d3dfb,
  abstract     = {{<p>Cobalt-containing nanoparticles have been prepared via thermal decomposition of cobalt acetate on the surface of poly(tetrafluoroethylene) (PTFE) microgranules forming a fluidized bed over the surface of hot mineral oil. Using transmission electron microscopy, the average size of the cobalt-containing nanoparticles has been determined to be 3.6 nm. The composition and structure of the nanoparticles have been determined by x-ray diffraction, extended x-ray absorption fine structure spectroscopy, and electron paramagnetic resonance, and the magnetic properties of the synthesized nanomaterial have been studied. The results indicate that the nanoparticles have a core-shell structure, with a metallic cobalt core (≲ 10 vol%) and a shell consisting of three phases: Co <sub>3</sub>O <sub>4</sub> (≲ 80%) and small amounts of CoO and CoF <sub>2</sub> (≲ 10%). The fluoride phase results from the interaction of the nanoparticles with surface fluorine atoms of the PTFE microgranules.</p>}},
  author       = {{Yurkov, G. Yu and Baranov, D. A. and Kozinkin, A. V. and Koksharov, Yu A. and Nedoseikina, T. I. and Shvachko, O. V. and Moksin, S. A. and Gubin, S. P.}},
  issn         = {{0020-1685}},
  language     = {{eng}},
  number       = {{9}},
  pages        = {{1012--1019}},
  publisher    = {{Pleiades Publishing}},
  series       = {{Inorganic Materials}},
  title        = {{Cobalt-containing core-shell nanoparticles on the surface of poly(tetrafluoroethylene) microgranules}},
  url          = {{http://dx.doi.org/10.1134/S0020168506090159}},
  doi          = {{10.1134/S0020168506090159}},
  volume       = {{42}},
  year         = {{2006}},
}