Hydrothermal growth of octahedral Fe3O4 crystals--颗粒学报PARTICUOLOGY

Peng, D., Beysen, S., Li, Q., Jian, J., Sun, Y., & Jiwuer, J. (2009). Hydrothermal growth of octahedral Fe3O4 crystals. Particuology, 7(1), 35–38. https://doi.org/10.1016/j.partic.2008.11.010

Hydrothermal growth of octahedral Fe₃O₄ crystals

Dengfeng Peng, Sadeh Beysen^*, Qiang Li, Jikang Jian, Yanfei Sun, Jilili Jiwuer

School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China

10.1016/j.partic.2008.11.010

Volume 7, Issue 1, 18 February 2009, Pages 35-38

Received 23 July 2008, Accepted 10 November 2008, Available online 17 January 2009.

E-mail: baishan@xju.edu.cn

Highlights

Abstract

This paper reports the growth of octahedral magnetic Fe₃O₄ particles from iron powders via a simple alkaline hydrothermal process. The chemical compositions and morphologies of the as-grown Fe₃O₄ particles were characterized by X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), and scanning electron microscopy (SEM). Structure characterization showed that the phase structure of the prepared particles evolved from α-Fe to pure Fe₃O₄ with increasing concentration of KOH, indicating the important role of KOH concentration on the formation of the magnetite octahedron. The magnetic properties of samples were also studied by means of a vibrating sample magnetometer (VSM). The pure magnetite Fe₃O₄ octahedrons exhibited a relatively high saturation magnetization of 96.7 emu/g.

Graphical abstract

Keywords

Fe₃O₄ octahedron; Hydrothermal method; Magnetite

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