Abstract
Iron oxide nanoparticles of reduced oxidation state, mainly in the form of magnetite, have been synthesized utilizing a new continuous, gas-phase, nonpremixed flame method using hydrocarbon fuels. This method takes advantage of the characteristics of the inverse flame, which is produced by injection of oxidizer into a surrounding flow of fuel. Unlike traditional flame methods, this configuration allows for the iron particle formation to be maintained in a more reducing environment. The effects of flame temperature, oxygen-enrichment and fuel dilution (i.e. the stoichiometric mixture fraction), and fuel composition on particle size, Fe oxidation state, and magnetic properties are evaluated and discussed. The crystallite size, Fe(II) fraction, and saturation magnetization were all found to increase with flame temperature. Flames of methane and ethylene were used, and the use of ethylene resulted in particles containing metallic Fe(0), in addition to magnetite, while no Fe(0) was present in samples synthesized using methane.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 257-265 |
| Number of pages | 9 |
| Journal | Journal of Aerosol Science |
| Volume | 41 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 2010 |
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Keywords
- Flame synthesis
- Iron oxide
- Magnetite
- Nanoparticles
- Superparamagnetic
ASJC Scopus subject areas
- Materials Science(all)
- Environmental Chemistry
- Pollution
Cite this
Gas-phase flame synthesis and properties of magnetic iron oxide nanoparticles with reduced oxidation state. / Kumfer, Benjamin M.; Shinoda, Kozo; Jeyadevan, Balachandran; Kennedy, Ian M.
In: Journal of Aerosol Science, Vol. 41, No. 3, 03.2010, p. 257-265.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Gas-phase flame synthesis and properties of magnetic iron oxide nanoparticles with reduced oxidation state
AU - Kumfer, Benjamin M.
AU - Shinoda, Kozo
AU - Jeyadevan, Balachandran
AU - Kennedy, Ian M.
PY - 2010/3
Y1 - 2010/3
N2 - Iron oxide nanoparticles of reduced oxidation state, mainly in the form of magnetite, have been synthesized utilizing a new continuous, gas-phase, nonpremixed flame method using hydrocarbon fuels. This method takes advantage of the characteristics of the inverse flame, which is produced by injection of oxidizer into a surrounding flow of fuel. Unlike traditional flame methods, this configuration allows for the iron particle formation to be maintained in a more reducing environment. The effects of flame temperature, oxygen-enrichment and fuel dilution (i.e. the stoichiometric mixture fraction), and fuel composition on particle size, Fe oxidation state, and magnetic properties are evaluated and discussed. The crystallite size, Fe(II) fraction, and saturation magnetization were all found to increase with flame temperature. Flames of methane and ethylene were used, and the use of ethylene resulted in particles containing metallic Fe(0), in addition to magnetite, while no Fe(0) was present in samples synthesized using methane.
AB - Iron oxide nanoparticles of reduced oxidation state, mainly in the form of magnetite, have been synthesized utilizing a new continuous, gas-phase, nonpremixed flame method using hydrocarbon fuels. This method takes advantage of the characteristics of the inverse flame, which is produced by injection of oxidizer into a surrounding flow of fuel. Unlike traditional flame methods, this configuration allows for the iron particle formation to be maintained in a more reducing environment. The effects of flame temperature, oxygen-enrichment and fuel dilution (i.e. the stoichiometric mixture fraction), and fuel composition on particle size, Fe oxidation state, and magnetic properties are evaluated and discussed. The crystallite size, Fe(II) fraction, and saturation magnetization were all found to increase with flame temperature. Flames of methane and ethylene were used, and the use of ethylene resulted in particles containing metallic Fe(0), in addition to magnetite, while no Fe(0) was present in samples synthesized using methane.
KW - Flame synthesis
KW - Iron oxide
KW - Magnetite
KW - Nanoparticles
KW - Superparamagnetic
UR - http://www.scopus.com/inward/record.url?scp=77049105595&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77049105595&partnerID=8YFLogxK
U2 - 10.1016/j.jaerosci.2010.01.003
DO - 10.1016/j.jaerosci.2010.01.003
M3 - Article
AN - SCOPUS:77049105595
VL - 41
SP - 257
EP - 265
JO - Journal of Aerosol Science
JF - Journal of Aerosol Science
SN - 0021-8502
IS - 3
ER -