Structural evolution and characteristics of the phase transformations between α-Fe2O3, Fe3O4 and γ-Fe2O3 nanoparticles under reducing and oxidizing atmospheres

Xin Zhang; Yongan Niu; Xiangdong Meng; Yao Li; Jiupeng Zhao

doi:10.1039/c3ce41269e

Structural evolution and characteristics of the phase transformations between α-Fe₂O₃, Fe₃O₄ and γ-Fe₂O₃ nanoparticles under reducing and oxidizing atmospheres

Xin Zhang
, Yongan Niu
, Xiangdong Meng
, Yao Li^*
, Jiupeng Zhao

^*Corresponding author for this work

School of Astronautics

School of Chemistry and Chemical Engineering, Harbin Institute of Technology
Harbin Institute of Technology
Jilin Normal University

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

336 Scopus citations

Abstract

The mechanism and conditions for the phase transformations from α-Fe₂O₃ to Fe₃O₄ and Fe ₃O₄ to γ-Fe₂O₃ nanoparticles have been investigated by the thermal analysis method. The morphologies and structures of various nanoparticles after annealing in H₂:Ar at 294 °C and in an O₂ atmosphere at 302 °C have been examined and characterized. Finally, we confirmed that the monodisperse, porous and magnetic γ-Fe₂O₃ nanoparticles could be obtained by annealing the α-Fe₂O₃ nanoparticles synthesized by the hydrothermal route.

Original language	English
Pages (from-to)	8166-8172
Number of pages	7
Journal	CrystEngComm
Volume	15
Issue number	40
DOIs	https://doi.org/10.1039/c3ce41269e
State	Published - 28 Oct 2013

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title = "Structural evolution and characteristics of the phase transformations between α-Fe2O3, Fe3O4 and γ-Fe2O3 nanoparticles under reducing and oxidizing atmospheres",

abstract = "The mechanism and conditions for the phase transformations from α-Fe2O3 to Fe3O4 and Fe 3O4 to γ-Fe2O3 nanoparticles have been investigated by the thermal analysis method. The morphologies and structures of various nanoparticles after annealing in H2:Ar at 294 °C and in an O2 atmosphere at 302 °C have been examined and characterized. Finally, we confirmed that the monodisperse, porous and magnetic γ-Fe2O3 nanoparticles could be obtained by annealing the α-Fe2O3 nanoparticles synthesized by the hydrothermal route.",

author = "Xin Zhang and Yongan Niu and Xiangdong Meng and Yao Li and Jiupeng Zhao",

year = "2013",

month = oct,

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doi = "10.1039/c3ce41269e",

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T1 - Structural evolution and characteristics of the phase transformations between α-Fe2O3, Fe3O4 and γ-Fe2O3 nanoparticles under reducing and oxidizing atmospheres

AU - Zhang, Xin

AU - Niu, Yongan

AU - Meng, Xiangdong

AU - Li, Yao

AU - Zhao, Jiupeng

PY - 2013/10/28

Y1 - 2013/10/28

N2 - The mechanism and conditions for the phase transformations from α-Fe2O3 to Fe3O4 and Fe 3O4 to γ-Fe2O3 nanoparticles have been investigated by the thermal analysis method. The morphologies and structures of various nanoparticles after annealing in H2:Ar at 294 °C and in an O2 atmosphere at 302 °C have been examined and characterized. Finally, we confirmed that the monodisperse, porous and magnetic γ-Fe2O3 nanoparticles could be obtained by annealing the α-Fe2O3 nanoparticles synthesized by the hydrothermal route.

AB - The mechanism and conditions for the phase transformations from α-Fe2O3 to Fe3O4 and Fe 3O4 to γ-Fe2O3 nanoparticles have been investigated by the thermal analysis method. The morphologies and structures of various nanoparticles after annealing in H2:Ar at 294 °C and in an O2 atmosphere at 302 °C have been examined and characterized. Finally, we confirmed that the monodisperse, porous and magnetic γ-Fe2O3 nanoparticles could be obtained by annealing the α-Fe2O3 nanoparticles synthesized by the hydrothermal route.

UR - https://www.scopus.com/pages/publications/84884572007

U2 - 10.1039/c3ce41269e

DO - 10.1039/c3ce41269e

M3 - 文章

AN - SCOPUS:84884572007

SN - 1466-8033

VL - 15

SP - 8166

EP - 8172

JO - CrystEngComm

JF - CrystEngComm

IS - 40

ER -

Structural evolution and characteristics of the phase transformations between α-Fe₂O₃, Fe₃O₄ and γ-Fe₂O₃ nanoparticles under reducing and oxidizing atmospheres

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