One-pot synthesis of CoFe-Fe3O4 nanocomposites with tunable magnetic properties and long term stability

被引：7
作者：
Li, Zhenhu [1 ]
Ma, Yurong [1 ]
Qi, Limin [1 ]
机构：
[1] Peking Univ, Coll Chem, BNLMS, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100871, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2013年 / 48卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Magnetic properties; Composites; magnetic materials; nanostructures; Oxides; SIZE-CONTROLLED SYNTHESIS; NANOPARTICLES; NANOCRYSTALS;
D O I：
10.1016/j.materresbull.2013.04.063
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work, uniform CoFe-Fe3O4 nanocomposites with variant Co/Fe molar ratios were synthesized through a facile one-pot method for the first time by thermal decomposition process in mixed solvents of 1-octadecene and oleic acid. The obtained magnetic nanoparticles were characterized by using TEM, HRTEM and XRD in details. The Co/Fe molar ratios in the final CoFe-Fe3O4 nanocomposites can be well tuned by the Co/Fe molar ratios in the reaction precursors. The obtained CoFe-Fe3O4 nanocomposites have high saturation magnetization values (up to 158 emu/g((Fe+Co))) and soft ferromagnetic properties (low coercivity, 338 Oe) at room temperature. The saturation magnetization values can be tailored from 60 to 158 emu/g((Fe+Co)) by changing the Co/Fe molar ratios in the reaction precursors from 0 to 0.2. The magnetization value of CoFe-Fe3O4 NPs remains 118 emu/g((Fe+Co)) after being exposed in the air for four months at room temperature, indicating its superior long term magnetic stability. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3157 / 3163
页数：7
相关论文
共 40 条
[1]   Synthesis and stabilization of FeCo nanoparticles [J].
Chaubey, Girija S. ;
Barcena, Carlos ;
Poudyal, Narayan ;
Rong, Chuanbing ;
Gao, Jinming ;
Sun, Shouheng ;
Liu, J. Ping. .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (23) :7214-+
[2]   Evolution of the structure and magnetic properties of FeCo nanoparticles in an alumina aerogel matrix [J].
Corrias, A ;
Casula, MF ;
Falqui, A ;
Paschina, G .
CHEMISTRY OF MATERIALS, 2004, 16 (16) :3130-3138
[3]   Multimillimetre-large superlattices of air-stable iron-cobalt nanoparticles [J].
Desvaux, C ;
Amiens, C ;
Fejes, P ;
Renaud, P ;
Respaud, M ;
Lecante, P ;
Snoeck, E ;
Chaudret, B .
NATURE MATERIALS, 2005, 4 (10) :750-753
[4]   Influence of metal content on size, dispersion, and magnetic properties of iron-cobalt alloy nanoparticles embedded in silica matrix [J].
Ennas, G ;
Falqui, A ;
Marras, S ;
Sangregorio, C ;
Marongiu, G .
CHEMISTRY OF MATERIALS, 2004, 16 (26) :5659-5663
[5]   Magnetic nanoparticles: synthesis, functionalization, and applications in bioimaging and magnetic energy storage [J].
Frey, Natalie A. ;
Peng, Sheng ;
Cheng, Kai ;
Sun, Shouheng .
CHEMICAL SOCIETY REVIEWS, 2009, 38 (09) :2532-2542
[6]   Transition metal oxide core-shell nanowires: Generic synthesis and transport studies [J].
Han, S ;
Li, C ;
Liu, ZQ ;
Lei, B ;
Zhang, DH ;
Jin, W ;
Liu, XL ;
Tang, T ;
Zhou, CW .
NANO LETTERS, 2004, 4 (07) :1241-1246
[7]   Shape-Controlled Growth and Shape-Dependent Cation Site Occupancy of Monodisperse Fe3O4 Nanoparticles [J].
Ho, Chien-Hsin ;
Tsai, Chih-Pin ;
Chung, Chia-Chi ;
Tsai, Chun-Ying ;
Chen, Fu-Rong ;
Lin, Hong-Ji ;
Lai, Chih-Huang .
CHEMISTRY OF MATERIALS, 2011, 23 (07) :1753-1760
[8]   Monodisperse Magnetic Nanoparticles for Theranostic Applications [J].
Ho, Don ;
Sun, Xiaolian ;
Sun, Shouheng .
ACCOUNTS OF CHEMICAL RESEARCH, 2011, 44 (10) :875-882
[9]   Enhancing Transversal Relaxation for Magnetite Nanoparticles in MR Imaging Using Gd3+-Chelated Mesoporous Silica Shells [J].
Huang, Chih-Chia ;
Tsai, Chiau-Yuang ;
Sheu, Hwo-Shuenn ;
Chuang, Kuei-Yi ;
Su, Chiu-Hun ;
Jeng, U-Ser ;
Cheng, Fong-Yu ;
Su, Chia-Hao ;
Lei, Huan-Yao ;
Yeh, Chen-Sheng .
ACS NANO, 2011, 5 (05) :3905-3916
[10]   Fatty acid salts as stabilizers in size- and shape-controlled nanocrystal synthesis:: The case of inverse spinel iron oxide [J].
Kovalenko, Maksym V. ;
Bodnarchuk, Maryna I. ;
Lechner, Rainer T. ;
Hesser, Guenter ;
Schaeffler, Friedrich ;
Heiss, Wolfgang .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (20) :6352-+
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