Synthesis of monodisperse nanocrystals of high crystallinity magnetite through solvothermal process

被引：38

作者：

Wang, Jun ^{[1
,2
,3
]}

Yao, Min ^{[2
]}

Xu, Gaojie ^{[1
]}

Cui, Ping ^{[1
]}

Zhao, Jingtai ^{[3
]}

机构：

[1] Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China

[2] Ningbo Univ, Dept Phys, Ningbo 315211, Zhejiang, Peoples R China

[3] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2009年 / 113卷 / 01期

基金：

中国博士后科学基金; 美国国家科学基金会;

关键词：

Magnetic materials; X-ray diffraction; Crystallinity; SIZE-SELECTION; NANOPARTICLES; PARTICLES; FE3O4; MAGNETIZATION; FINE;

D O I：

10.1016/j.matchemphys.2008.07.080

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A solvothermal process has been applied for the preparation of monodisperse magnetite by the decomposition of chelate iron alkoxide complexes with diethylene glycol. The magnetite nanocrystals have narrow size distribution and high crystallinity. The Fe3O4 products are characterized by X-ray diffraction and transmission electron microscopy, Mossbauer spectra and vibrating sample magnetometer (VSM). The nanoscale (similar to 50 nm) Fe3O4 powder obtained at 230 degrees C for 6 h possessed a saturation magnetization of 86.6 emu g(-1), a little lower than that of the correspondent bulk Fe3O4 (92 emu g(-1)). It is suggested that the high-crystallized Fe3O4 nanocrystals formed under appropriate solvothermal conditions should be responsible for the increased saturation magnetization in the nanosized Fe3O4. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：6 / 9

页数：4

共 23 条

[1] The effect of Al-content and crystallinity on the magnetic properties of goethites [J].

Barrero, CA ;

Vandenberghe, RE ;

De Grave, E .

HYPERFINE INTERACTIONS, 1999, 122 (1-2) :39-46

[2] Synthesis of variable-sized nanocrystals of Fe3O4 with high surface reactivity [J].

Caruntu, D ;

Caruntu, G ;

Chen, Y ;

O'Connor, CJ ;

Goloverda, G ;

Kolesnichenko, VL .

CHEMISTRY OF MATERIALS, 2004, 16 (25) :5527-5534

[3] Raman and magnetization studies of barium ferrite powder prepared by water-in-oil microemulsion [J].

Chen, MS ;

Shen, ZX ;

Liu, XY ;

Wang, J .

JOURNAL OF MATERIALS RESEARCH, 2000, 15 (02) :483-487

[4]

Fried T, 2001, ADV MATER, V13, P1158, DOI 10.1002/1521-4095(200108)13:15<1158::AID-ADMA1158>3.0.CO

[5]

2-6

[6]

Hafeli U., 1997, Scientific and Clinical Applications of Magnetic Carriers

[7] CRYSTALLITE SIZE EFFECT ON SATURATION MAGNETIZATION OF FINE FERRIMAGNETIC PARTICLES [J].

HAN, DH ;

WANG, JP ;

LUO, HL .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1994, 136 (1-2) :176-182

[8] Synthesis of highly crystalline and monodisperse maghemite nanocrystallites without a size-selection process [J].

Hyeon, T ;

Lee, SS ;

Park, J ;

Chung, Y ;

Bin Na, H .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (51) :12798-12801

[9]

JEZEQUEL D, 1994, MATER SCI FORUM, V152-, P339, DOI 10.4028/www.scientific.net/MSF.152-153.339

[10] Synthesis and characterization of nanometer-size Fe3O4 and gamma-Fe2O3 particles [J].

Kang, YS ;

Risbud, S ;

Rabolt, JF ;

Stroeve, P .

CHEMISTRY OF MATERIALS, 1996, 8 (09) :2209-&

← 1 2 3 →