Stable Core Shell Co3Fe7-CoFe2O4 Nanoparticles Synthesized via Flame Spray Pyrolysis Approach

被引：38

作者：

Li, Yunfeng ^{[1
]}

Hu, Yanjie ^{[1
]}

Huo, Junchao ^{[1
]}

Jiang, Hao ^{[1
]}

Li, Chunzhong ^{[1
]}

Huang, Guangjian ^{[2
]}

机构：

[1] E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

[2] Fudan Univ, Dept Surg, Huashan Hosp, Shanghai 200040, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2012年 / 51卷 / 34期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

MAGNETIC NANOPARTICLES; METAL NANOPARTICLES; ALLOY; FUNCTIONALIZATION; NANOALLOYS; PARTICLES; CLUSTERS;

D O I：

10.1021/ie3010644

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Air stable Co3Fe7-CoFe2O4 nanoparticles have been synthesized via one-step flame spray pyrolysis of a mixture of Fe/Co precursor solution under stronger reducing atmosphere. The as-synthesized nanoparticles with diameters of 20-80 nm showed a typical core shell structure and high stability for being one month in air, whose metallic Co3Fe7 cores were protected against oxidation by a surface shell of about 2-4 nm cobalt iron oxide (CoFe2O4). The ratio of metallic Fe/Co alloy nanoparticles was 7:3. The alloy nanoparticles exhibited enhanced saturation magnetization (126.1 emu/g), compared with flame sprayed iron nanoparticles with the same conditions. The formation process of metallic alloy nanoparticles with core-shell structure was investigated, which included three stages: flame combustion, reducing, and surface oxidation during the flame process. It is reckoned that such a continuous production approach is an effective way to produce the stable Co3Fe7 alloy nanoparticles with high saturation magnetization.

引用

页码：11157 / 11162

页数：6

共 38 条

[1] One-step large scale gas phase synthesis of Mn2+ doped ZnS nanoparticles in reducing flames [J].

Athanassiou, E. K. ;

Grass, R. N. ;

Stark, W. J. .

NANOTECHNOLOGY, 2010, 21 (21)

[2] Preparation of homogeneous, bulk nanocrystalline Ni/Mo alloys with tripled vickers hardness using flame-made metal nanoparticles [J].

Athanassiou, Evagelos K. ;

Grass, Robert N. ;

Osterwalder, Neil ;

Stark, Wendelin J. .

CHEMISTRY OF MATERIALS, 2007, 19 (20) :4847-4854

[3] Chemical Aerosol Engineering as a Novel Tool for Material Science: From Oxides to Salt and Metal Nanoparticles [J].

Athanassiou, Evagelos K. ;

Grass, Robert N. ;

Stark, Wendelin J. .

AEROSOL SCIENCE AND TECHNOLOGY, 2010, 44 (02) :161-172

[4] Comparison of amorphous TCP nanoparticles to micron-sized α-TCP as starting materials for calcium phosphate cements [J].

Brunner, Tobias J. ;

Bohner, Marc ;

Dora, Claudio ;

Gerber, Christian ;

Stark, Wendelin J. .

JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS, 2007, 83B (02) :400-407

[5] 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-+

[6] Nanoalloys: From theory to applications of alloy clusters and nanoparticles [J].

Ferrando, Riccardo ;

Jellinek, Julius ;

Johnston, Roy L. .

CHEMICAL REVIEWS, 2008, 108 (03) :845-910

[7] Gas phase synthesis of fcc-cobalt nanoparticles [J].

Grass, RN ;

Stark, WJ .

JOURNAL OF MATERIALS CHEMISTRY, 2006, 16 (19) :1825-1830

[8] Flame spray synthesis under a non-oxidizing atmosphere: Preparation of metallic bismuth nanoparticles and nanocrystalline bulk bismuth metal [J].

Grass, Robert N. ;

Stark, Wendelin J. .

JOURNAL OF NANOPARTICLE RESEARCH, 2006, 8 (05) :729-736

[9]

Gubin S.P., 2009, MAGNETIC NANOPARTICL, DOI DOI 10.1002/9783527627561

[10] Synthesis and Covalent Surface Functionalization of Nonoxidic Iron Core-Shell Nanomagnets [J].

Herrmann, Inge K. ;

Grass, Robert N. ;

Mazunin, Dmitry ;

Stark, Wendelin J. .

CHEMISTRY OF MATERIALS, 2009, 21 (14) :3275-3281

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