Issue 40, 2013
From the journal:

CrystEngComm

Structural evolution and characteristics of the phase transformations between α-Fe2O3, Fe3O4 and γ-Fe2O3nanoparticles under reducing and oxidizing atmospheres†

Xin Zhang,a   Yongan Niu,b   Xiangdong Meng,c   Yao Li*b  and  Jiupeng Zhao*a  

* Corresponding authors

a Harbin Institute of Technology, School of Chemical Engineering and Technology, Harbin, P. R. China
E-mail: jiupengzhao@126.com
Fax: +86 451 86403767
Tel: +86 451 86403767

b Center for Composite Materials, Harbin Institute of Technology, Harbin, P. R. China
E-mail: yaoli@hit.edu.cn
Fax: +86 451 86402345
Tel: +86 451 86402345

c School of Physics, Jilin normal University, Siping, P. R. China

Abstract

The mechanism and conditions for the phase transformations from α-Fe2O3 to Fe3O4 and Fe3O4 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.

Graphical abstract: 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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Article information

DOI
https://doi.org/10.1039/C3CE41269E
Article type
Paper
Submitted
28 Jun 2013
Accepted
05 Aug 2013
First published
08 Aug 2013

CrystEngComm, 2013,15, 8166-8172

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

X. Zhang, Y. Niu, X. Meng, Y. Li and J. Zhao, CrystEngComm, 2013, 15, 8166 DOI: 10.1039/C3CE41269E

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