Synthesis and properties of γ-Fe2O3 nanoclusters within mesoporous aluminosilicate matrices

Lei Zhang; Georgia C. Papaefthymiou; Jackie Y. Ying

doi:10.1021/jp010174i

Synthesis and properties of γ-Fe₂O₃ nanoclusters within mesoporous aluminosilicate matrices

Lei Zhang, Georgia C. Papaefthymiou, Jackie Y. Ying^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

104 Scopus citations

Abstract

Iron oxide nanoclusters were synthesized within mesoporous MCM-41 aluminosilicate matrices via evaporation-condensation of volatile Fe(CO)₅. The well-defined hexagonally packed cylindrical pore structure of MCM-41 led to the derivation of γ-Fe₂O₃ particles with spherical and elongated morphologies. Magnetization studies and Mössbauer spectroscopy indicated that the γ-Fe₂O₃/MCM-41 nanocomposites exhibited interesting superparamagnetic behavior. A blue shift in the absorption edge relative to bulk iron oxide was noted in the UV-Vis spectra. Strain at the particle-support interface and quantum confinement effects played a critical role in determining the overall magnetic and optical behavior of the γ-Fe₂O₃/MCM-41 nanocomposites. The iron oxide nanoclusters within the MCM-41 matrix showed high thermal stability and increased magnetization when calcined at high temperatures.

Original language	English
Pages (from-to)	7414-7423
Number of pages	10
Journal	Journal of Physical Chemistry B
Volume	105
Issue number	31
DOIs	https://doi.org/10.1021/jp010174i
State	Published - 9 Aug 2001
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1021/jp010174i

Cite this

@article{8d23adbade8946a08034382fd77387e3,

title = "Synthesis and properties of γ-Fe2O3 nanoclusters within mesoporous aluminosilicate matrices",

abstract = "Iron oxide nanoclusters were synthesized within mesoporous MCM-41 aluminosilicate matrices via evaporation-condensation of volatile Fe(CO)5. The well-defined hexagonally packed cylindrical pore structure of MCM-41 led to the derivation of γ-Fe2O3 particles with spherical and elongated morphologies. Magnetization studies and M{\"o}ssbauer spectroscopy indicated that the γ-Fe2O3/MCM-41 nanocomposites exhibited interesting superparamagnetic behavior. A blue shift in the absorption edge relative to bulk iron oxide was noted in the UV-Vis spectra. Strain at the particle-support interface and quantum confinement effects played a critical role in determining the overall magnetic and optical behavior of the γ-Fe2O3/MCM-41 nanocomposites. The iron oxide nanoclusters within the MCM-41 matrix showed high thermal stability and increased magnetization when calcined at high temperatures.",

author = "Lei Zhang and Papaefthymiou, \{Georgia C.\} and Ying, \{Jackie Y.\}",

year = "2001",

month = aug,

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doi = "10.1021/jp010174i",

language = "English",

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journal = "Journal of Physical Chemistry B",

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TY - JOUR

T1 - Synthesis and properties of γ-Fe2O3 nanoclusters within mesoporous aluminosilicate matrices

AU - Zhang, Lei

AU - Papaefthymiou, Georgia C.

AU - Ying, Jackie Y.

PY - 2001/8/9

Y1 - 2001/8/9

N2 - Iron oxide nanoclusters were synthesized within mesoporous MCM-41 aluminosilicate matrices via evaporation-condensation of volatile Fe(CO)5. The well-defined hexagonally packed cylindrical pore structure of MCM-41 led to the derivation of γ-Fe2O3 particles with spherical and elongated morphologies. Magnetization studies and Mössbauer spectroscopy indicated that the γ-Fe2O3/MCM-41 nanocomposites exhibited interesting superparamagnetic behavior. A blue shift in the absorption edge relative to bulk iron oxide was noted in the UV-Vis spectra. Strain at the particle-support interface and quantum confinement effects played a critical role in determining the overall magnetic and optical behavior of the γ-Fe2O3/MCM-41 nanocomposites. The iron oxide nanoclusters within the MCM-41 matrix showed high thermal stability and increased magnetization when calcined at high temperatures.

AB - Iron oxide nanoclusters were synthesized within mesoporous MCM-41 aluminosilicate matrices via evaporation-condensation of volatile Fe(CO)5. The well-defined hexagonally packed cylindrical pore structure of MCM-41 led to the derivation of γ-Fe2O3 particles with spherical and elongated morphologies. Magnetization studies and Mössbauer spectroscopy indicated that the γ-Fe2O3/MCM-41 nanocomposites exhibited interesting superparamagnetic behavior. A blue shift in the absorption edge relative to bulk iron oxide was noted in the UV-Vis spectra. Strain at the particle-support interface and quantum confinement effects played a critical role in determining the overall magnetic and optical behavior of the γ-Fe2O3/MCM-41 nanocomposites. The iron oxide nanoclusters within the MCM-41 matrix showed high thermal stability and increased magnetization when calcined at high temperatures.

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