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New product from old reaction: uniform magnetite nanoparticles from iron-mediated synthesis of alkali iodides and their protection from leaching in acidic media

Pogorilyi, R. P.; Melnyk, I. V.; Zub, Y. L.; Carlson, Stefan LU ; Daniel, G.; Svedlindh, P.; Seisenbaeva, G. A. and Kessler, V. G. (2014) In RSC Advances 4(43). p.22606-22612
Abstract
Iron-mediated synthesis of alkali metal iodides was quite unexpectedly demonstrated to be able to serve as a cost-efficient and reliable source of spherical single crystalline near-stoichiometric magnetite (Fe3O4) nanoparticles as revealed by TEM and XRD studies and also by XANES spectroscopic quantification of the Fe2+-content. Using the particles as nuclei for the Stoeber synthesis of silica nanoparticles, core-shell magnetic material has been produced. The nature of the magnetic component was probed by XANES spectroscopy. The size of the particles is dependent on the synthesis conditions and Si : Fe ratio but can be kept below 100 nm. It is the Si : Fe ratio that determines the stability of the particles in acidic medium. The latter was... (More)
Iron-mediated synthesis of alkali metal iodides was quite unexpectedly demonstrated to be able to serve as a cost-efficient and reliable source of spherical single crystalline near-stoichiometric magnetite (Fe3O4) nanoparticles as revealed by TEM and XRD studies and also by XANES spectroscopic quantification of the Fe2+-content. Using the particles as nuclei for the Stoeber synthesis of silica nanoparticles, core-shell magnetic material has been produced. The nature of the magnetic component was probed by XANES spectroscopy. The size of the particles is dependent on the synthesis conditions and Si : Fe ratio but can be kept below 100 nm. It is the Si : Fe ratio that determines the stability of the particles in acidic medium. The latter was investigated spectrophotometrically as leaching of Fe3+-cations. Considerable stability was observed at Si : Fe > 10, while at Si : Fe >= 20 no measurable leaching could be observed in over 10 days. Magnetic nanoparticles with improved stability in acidic medium provide an attractive basis for creation of adsorbent materials for applications in harsh media. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
RSC Advances
volume
4
issue
43
pages
22606 - 22612
publisher
Royal Society of Chemistry
external identifiers
  • wos:000337124900043
  • scopus:84901760346
ISSN
2046-2069
DOI
10.1039/c4ra02217c
language
English
LU publication?
yes
id
089d1a42-9403-43d0-b920-aa0601bdc61a (old id 4548102)
date added to LUP
2014-07-17 08:56:59
date last changed
2017-11-19 04:02:11
@article{089d1a42-9403-43d0-b920-aa0601bdc61a,
  abstract     = {Iron-mediated synthesis of alkali metal iodides was quite unexpectedly demonstrated to be able to serve as a cost-efficient and reliable source of spherical single crystalline near-stoichiometric magnetite (Fe3O4) nanoparticles as revealed by TEM and XRD studies and also by XANES spectroscopic quantification of the Fe2+-content. Using the particles as nuclei for the Stoeber synthesis of silica nanoparticles, core-shell magnetic material has been produced. The nature of the magnetic component was probed by XANES spectroscopy. The size of the particles is dependent on the synthesis conditions and Si : Fe ratio but can be kept below 100 nm. It is the Si : Fe ratio that determines the stability of the particles in acidic medium. The latter was investigated spectrophotometrically as leaching of Fe3+-cations. Considerable stability was observed at Si : Fe > 10, while at Si : Fe >= 20 no measurable leaching could be observed in over 10 days. Magnetic nanoparticles with improved stability in acidic medium provide an attractive basis for creation of adsorbent materials for applications in harsh media.},
  author       = {Pogorilyi, R. P. and Melnyk, I. V. and Zub, Y. L. and Carlson, Stefan and Daniel, G. and Svedlindh, P. and Seisenbaeva, G. A. and Kessler, V. G.},
  issn         = {2046-2069},
  language     = {eng},
  number       = {43},
  pages        = {22606--22612},
  publisher    = {Royal Society of Chemistry},
  series       = {RSC Advances},
  title        = {New product from old reaction: uniform magnetite nanoparticles from iron-mediated synthesis of alkali iodides and their protection from leaching in acidic media},
  url          = {http://dx.doi.org/10.1039/c4ra02217c},
  volume       = {4},
  year         = {2014},
}