Fe3O4 nano-whiskers by ultrasonic-aided reduction in concentrated NaOH solution--颗粒学报PARTICUOLOGY

Yu, C., Hao, X., Jiang, H., & Wang, L. (2011). Fe3O4 nano-whiskers by ultrasonic-aided reduction in concentrated NaOH solution. Particuology, 9(1), 86-90. https://doi.org/10.1016/j.partic.2010.06.003

Fe₃O₄ nano-whiskers by ultrasonic-aided reduction in concentrated NaOH solution

Chenglong Yu ^{a b *}, Xin Hao ^a, Hongtao Jiang ^a, Lili Wang ^a

a School of Materials Science and Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China
b Research Laboratory of Hydrothermal Chemistry, Faculty of Science, Kochi University, Kochi 7808520, Japan

10.1016/j.partic.2010.06.003

Volume 9, Issue 1, February 2011, Pages 86-90

Received 3 February 2010, Revised 10 June 2010, Accepted 17 June 2010, Available online 10 December 2010.

E-mail: johnyucl@yahoo.com.cn

Highlights

Abstract

Fe₃O₄ nano-whiskers were synthesized via ultrasonic-aided reduction of FeCl₂·4H₂O with N₂H₄·H₂O in concentrated NaOH solution. Phase identification and morphology observation were conducted by X-ray diffraction (XRD) analysis, transmission electron microscopy (TEM) and field emission scanning electron microscopy (FE-SEM). Face scanning energy dispersive spectrum (face scanning EDS) and two-dimensional fast Fourier transform (2DFFT) for element distribution were carried out for confirming composition homogeneity. From XRD and TEM, the synthesized Fe₃O₄ nano-whiskers are of cubic phase with average dimension of 20 nm × 200 nm (average aspect ratio of 10). FE-SEM shows that the nano-whiskers without dispersion are interconnected into a network at a scale of 20 μm. 2DFFT of the distribution of Fe and O from face scanning EDS confirms the composition homogeneity of the synthesized Fe₃O₄. Hydrazine hydrate determines the formation of the nano-whiskers, while the possible mechanism is the preferred growth along certain orientation with the aid of ultrasonic treatment.

Graphical abstract

Keywords

Fe₃O₄ nano-whiskers; Morphology; Homogeneity; Two-dimensional fast Fourier transform

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