Weakly magnetic field-assisted synthesis of magnetite nano-particles in oxidative co-precipitation--颗粒学报PARTICUOLOGY

Hu, D., Wang, Y., & Song, Q. (2009). Weakly magnetic field-assisted synthesis of magnetite nano-particles in oxidative co-precipitation. Particuology, 7(5), 363–367. https://doi.org/10.1016/j.partic.2009.03.005

Weakly magnetic field-assisted synthesis of magnetite nano-particles in oxidative co-precipitation

Dawei Hu ^a, Yanmin Wang ^{a b *}, Qi Song ^a

a College of Materials Science and Engineering, South China University of Technology, 510640 Guangzhou, China
b Key Laboratory of Special Functional Materials under Ministry of Education, 510640 Guangzhou, China

10.1016/j.partic.2009.03.005

Volume 7, Issue 5, October 2009, Pages 363-367

Received 11 February 2009, Revised 6 March 2009, Accepted 14 March 2009, Available online 28 May 2009.

E-mail: wangym@scut.edu.cn

Highlights

Abstract

This paper presents experimental results on weakly magnetic field-assisted synthesis of magnetite (Fe₃O₄) nano-particles in an oxidative co-precipitation method, in comparison to the case without magnetic induction. The XRD results show that a weakly magnetic induction below 220 Gs could accelerate the phase transformation from goethite (α-FeOOH) to magnetite (Fe₃O₄), and affect the crystal structure, the particle size/morphology and magnetic response of the magnetite nano-particles synthesized. In addition, a higher concentration of the FeCl₂ solution in the synthesis reaction led to finer particles, both with and without magnetic induction.

Graphical abstract

Keywords

Magnetic field; Oxidative co-precipitation; Nano-particle; Magnetite; Morphology

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