Synthesis of Fe3O4 nanoparticles with various sizes and magnetic properties by controlled hydrolysis

Hironori Iida; Kosuke Takayanagi; Takuya Nakanishi; Tetsuya Osaka

doi:10.1016/j.jcis.2007.05.047

Synthesis of Fe₃O₄ nanoparticles with various sizes and magnetic properties by controlled hydrolysis

Hironori Iida, Kosuke Takayanagi, Takuya Nakanishi, Tetsuya Osaka^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

407 Citations (Scopus)

Abstract

Nanoparticles of Fe₃O₄ were synthesized by hydrolysis in an aqueous solution containing ferrous and ferric salts at various ratios with 1,6-hexanediamine as a base. It was found that the ferrous to ferric ratio influences the reaction mechanism for the formation of Fe₃O₄. When the ratio of ferrous to ferric ions was increased, the formation of large hydroxide particles as a precursor of Fe₃O₄ was promoted, which resulted in an increase in the size of Fe₃O₄ nanoparticles. As a result, the mean diameter of Fe₃O₄ nanoparticles increased from ∼9 to ∼37 nm as the molar percentage of ferrous ions with respect to the total iron ions was increased from 33 to 100%. Furthermore, it was demonstrated that magnetic properties of Fe₃O₄ nanoparticles can be controlled by adjusting the molar ratio of ferrous to ferric ions as well as the particle diameter.

Original language	English
Pages (from-to)	274-280
Number of pages	7
Journal	Journal of Colloid And Interface Science
Volume	314
Issue number	1
DOIs	https://doi.org/10.1016/j.jcis.2007.05.047
Publication status	Published - 2007 Oct 1

Keywords

FeO nanoparticle
Ferrous and ferric ions
Hydrolysis
Magnetic property
Particle diameter

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

Access to Document

10.1016/j.jcis.2007.05.047

Cite this

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title = "Synthesis of Fe3O4 nanoparticles with various sizes and magnetic properties by controlled hydrolysis",

abstract = "Nanoparticles of Fe3O4 were synthesized by hydrolysis in an aqueous solution containing ferrous and ferric salts at various ratios with 1,6-hexanediamine as a base. It was found that the ferrous to ferric ratio influences the reaction mechanism for the formation of Fe3O4. When the ratio of ferrous to ferric ions was increased, the formation of large hydroxide particles as a precursor of Fe3O4 was promoted, which resulted in an increase in the size of Fe3O4 nanoparticles. As a result, the mean diameter of Fe3O4 nanoparticles increased from ∼9 to ∼37 nm as the molar percentage of ferrous ions with respect to the total iron ions was increased from 33 to 100%. Furthermore, it was demonstrated that magnetic properties of Fe3O4 nanoparticles can be controlled by adjusting the molar ratio of ferrous to ferric ions as well as the particle diameter.",

keywords = "FeO nanoparticle, Ferrous and ferric ions, Hydrolysis, Magnetic property, Particle diameter",

author = "Hironori Iida and Kosuke Takayanagi and Takuya Nakanishi and Tetsuya Osaka",

note = "Funding Information: This work was carried out at the Center for Practical Nano-Chemistry and the Consolidated Research Institute for Advanced Science and Medical Care, Waseda University (ASMeW), which are financially supported, respectively, by the 21st Century COE Program and the Encouraging Development of Strategic Research Centers Program of the Ministry of Education, Culture, Sports, Science and Technology, Japan. Assistance in manuscript preparation provided by Dr. Yutaka Okinaka is gratefully acknowledged.",

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AU - Iida, Hironori

AU - Takayanagi, Kosuke

AU - Nakanishi, Takuya

AU - Osaka, Tetsuya

N1 - Funding Information: This work was carried out at the Center for Practical Nano-Chemistry and the Consolidated Research Institute for Advanced Science and Medical Care, Waseda University (ASMeW), which are financially supported, respectively, by the 21st Century COE Program and the Encouraging Development of Strategic Research Centers Program of the Ministry of Education, Culture, Sports, Science and Technology, Japan. Assistance in manuscript preparation provided by Dr. Yutaka Okinaka is gratefully acknowledged.

PY - 2007/10/1

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N2 - Nanoparticles of Fe3O4 were synthesized by hydrolysis in an aqueous solution containing ferrous and ferric salts at various ratios with 1,6-hexanediamine as a base. It was found that the ferrous to ferric ratio influences the reaction mechanism for the formation of Fe3O4. When the ratio of ferrous to ferric ions was increased, the formation of large hydroxide particles as a precursor of Fe3O4 was promoted, which resulted in an increase in the size of Fe3O4 nanoparticles. As a result, the mean diameter of Fe3O4 nanoparticles increased from ∼9 to ∼37 nm as the molar percentage of ferrous ions with respect to the total iron ions was increased from 33 to 100%. Furthermore, it was demonstrated that magnetic properties of Fe3O4 nanoparticles can be controlled by adjusting the molar ratio of ferrous to ferric ions as well as the particle diameter.

AB - Nanoparticles of Fe3O4 were synthesized by hydrolysis in an aqueous solution containing ferrous and ferric salts at various ratios with 1,6-hexanediamine as a base. It was found that the ferrous to ferric ratio influences the reaction mechanism for the formation of Fe3O4. When the ratio of ferrous to ferric ions was increased, the formation of large hydroxide particles as a precursor of Fe3O4 was promoted, which resulted in an increase in the size of Fe3O4 nanoparticles. As a result, the mean diameter of Fe3O4 nanoparticles increased from ∼9 to ∼37 nm as the molar percentage of ferrous ions with respect to the total iron ions was increased from 33 to 100%. Furthermore, it was demonstrated that magnetic properties of Fe3O4 nanoparticles can be controlled by adjusting the molar ratio of ferrous to ferric ions as well as the particle diameter.

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KW - Particle diameter

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