A novel approach for preparation of γ-Fe2O3 nanoparticles: Successive reduction-oxidation in reverse micelles

Hironori Iida; Harumi Takada; Takuya Nakanishi; Tetsuya Osaka

A novel approach for preparation of γ-Fe₂O₃ nanoparticles: Successive reduction-oxidation in reverse micelles

Hironori Iida^*, Harumi Takada, Takuya Nakanishi, Tetsuya Osaka

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

A novel approach for the preparation of γ-Fe₂O₃ nanoparticles based on successive reduction-oxidation in reverse micelles is reported. In this method, γ-Fe₂O₃ nanoparticles are formed via chemical reduction of ferrous or ferric ions by a reducing agent such as NaBH₄, N₂H₄, or NaH₂PO ₂, followed by successive oxidation in reverse micelles. The generation of nanoparticles is caused by the "electroless deposition" in reverse micelles, and it was found that the crystal structure and the magnetic properties of the products depend on the redox potential of the reducing agent and the catalytic activity of the metal surface. In the case using NaBH₄ as a reducing agent, highly crystalline γ-Fe ₂O₃ nanoparticles were successfully synthesized.

Original language	English
Title of host publication	Magnetic Materials, Processes, and Devices VIII - Proceedings of the International Symposium
Pages	325-329
Number of pages	5
Publication status	Published - 2006 Dec 1
Event	206th ECS Meeting - Honolulu, HI, United States Duration: 2004 Oct 5 → 2004 Oct 8

Publication series

Name	Proceedings - Electrochemical Society
Volume	PV 2004-23

Conference

Conference	206th ECS Meeting
Country/Territory	United States
City	Honolulu, HI
Period	04/10/5 → 04/10/8

ASJC Scopus subject areas

Engineering(all)

Cite this

A novel approach for preparation of γ-Fe₂O₃ nanoparticles: Successive reduction-oxidation in reverse micelles. / Iida, Hironori; Takada, Harumi; Nakanishi, Takuya et al.
Magnetic Materials, Processes, and Devices VIII - Proceedings of the International Symposium. 2006. p. 325-329 (Proceedings - Electrochemical Society; Vol. PV 2004-23).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Iida, H, Takada, H, Nakanishi, T & Osaka, T 2006, A novel approach for preparation of γ-Fe₂O₃ nanoparticles: Successive reduction-oxidation in reverse micelles. in Magnetic Materials, Processes, and Devices VIII - Proceedings of the International Symposium. Proceedings - Electrochemical Society, vol. PV 2004-23, pp. 325-329, 206th ECS Meeting, Honolulu, HI, United States, 04/10/5.

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N2 - A novel approach for the preparation of γ-Fe2O3 nanoparticles based on successive reduction-oxidation in reverse micelles is reported. In this method, γ-Fe2O3 nanoparticles are formed via chemical reduction of ferrous or ferric ions by a reducing agent such as NaBH4, N2H4, or NaH2PO 2, followed by successive oxidation in reverse micelles. The generation of nanoparticles is caused by the "electroless deposition" in reverse micelles, and it was found that the crystal structure and the magnetic properties of the products depend on the redox potential of the reducing agent and the catalytic activity of the metal surface. In the case using NaBH4 as a reducing agent, highly crystalline γ-Fe 2O3 nanoparticles were successfully synthesized.

AB - A novel approach for the preparation of γ-Fe2O3 nanoparticles based on successive reduction-oxidation in reverse micelles is reported. In this method, γ-Fe2O3 nanoparticles are formed via chemical reduction of ferrous or ferric ions by a reducing agent such as NaBH4, N2H4, or NaH2PO 2, followed by successive oxidation in reverse micelles. The generation of nanoparticles is caused by the "electroless deposition" in reverse micelles, and it was found that the crystal structure and the magnetic properties of the products depend on the redox potential of the reducing agent and the catalytic activity of the metal surface. In the case using NaBH4 as a reducing agent, highly crystalline γ-Fe 2O3 nanoparticles were successfully synthesized.

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