Controlled Growth Morphology of Porous Nanocrystal Iron Oxide by Electrodeposition

Chemical Research in Chinese Universities ›› 2009, Vol. 25 ›› Issue (5): 595-599.

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Controlled Growth Morphology of Porous Nanocrystal Iron Oxide by Electrodeposition

LI Li^1,2 and SHI Ke-ying^1,2*

1. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education,
2. Laboratory of Physical Chemistry, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China

Received:2009-02-23 Revised:2009-05-05 Online:2009-09-25 Published:2009-12-07
Contact: SHI Ke-ying, E-mail: shkying@eyou.com
Supported by:
Supported by the National Natural Science Foundation of China(No.20676027) and Postdoctoral Foundation of Heilongjiang Province, China(No.LBH-Q07111).

Abstract

Abstract:

Fe(II) was deposited into the bottom of the mesopores of highly ordered large caged cubic mesoporous silica by electrodeposition. And the deposited Fe mesoporous silica thin film was treated by 1%―4% HF to remove the SiO₂ template and then calcined. It was found that nanowire bundles, dendritic plates of porous iron oxide, dense parallel backbones of porous iron oxide were obtained at –1.4― –1.6 V and 0.08―0.1 mol/L electrolyte concentration after calcinations; the dendritic pattern of porous iron oxide film templated by the SBA-16 film was obtained in macrostructure at a higher absolute value of cathode potential(–1.7― –1.8 V) and a lower electrolyte concentration(0.02―0.05 mol/L), the dendritic pattern of porous iron oxide film could copy the microstructure of SBA-16 film; Fe(II) nanowires grew and formed in one dimension(1D) and two-dimension(2D) electrocrystallization at a potential of –1.6― –1.7 V and an electrolyte concentration of 0.05 mol/L, and the shape of the 1D or 2D crystalline iron oxide nanowires calcined was similar to the original shape of the SBA-16 channels. The desired morphology and size of porous nanocrystal iron oxide can be obtained by adjusting the applied potential value and electrolyte concentration, and all kinds of morphologies of porous nanostructure crystal iron oxide can be prepared.

Key words: Electrocrystallization; Deposition; Porous iron oxide; Morphology

LI Li and SHI Ke-ying*. Controlled Growth Morphology of Porous Nanocrystal Iron Oxide by Electrodeposition[J]. Chemical Research in Chinese Universities, 2009, 25(5): 595-599.

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Controlled Growth Morphology of Porous Nanocrystal Iron Oxide by Electrodeposition

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