The study of novel Fe3O4@γ-Fe2O3 core/shell nanomaterials with improved properties

被引：118

作者：

Gao, Qian ^{[1
,2
]}

Chen, Fenghua ^{[1
,2
]}

Zhang, Jilin ^{[1
]}

Hong, Guangyan ^{[1
]}

Ni, Jiazuan ^{[1
]}

Wei, Xiao ^{[3
]}

Wang, Dejun ^{[3
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Applicat Rare Earth Resources, Changchun 130022, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

[3] Jilin Univ, Coll Chem, Changchun 130012, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2009年 / 321卷 / 08期

关键词：

Fe3O4@gamma-Fe2O3 core/shell nanomaterials; Calcine; Stability; Magnetic property; Photovoltage response; FEPT NANOPARTICLES; FE3O4; TISSUE;

D O I：

10.1016/j.jmmm.2008.10.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The surface structure of the iron oxide nanoparticles obtained by the co-precipitation method has been investigated, and a thin layer of alpha-FeOOH absorbed on surface of the nanoparticle is confirmed by analyses of Fourier transform infrared (FTIR), X-ray photoelectron spectra (XPS) and surface photovoltage spectroscopy (SPS). After annealed at 400 degrees C, the alpha-FeOOH can be converted to gamma-Fe2O3. The simple-annealed procedure resulted in the formation of Fe3O4@gamma-Fe2O3 core/shell structure with improved stability and a higher magnetic saturation value, and also the simple method can be used to obtain core/shell structure in other similar system. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1052 / 1057

页数：6

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