Time-Dependent Growth of Hematiete (α-Fe₂O₃) Nanotube Arrays Produced by Iron Anodizing in Ethylene Glycol Solution

Abstract:

Hematiete (α-Fe2O3) nanotube arrays (NTAs) were prepared on the iron foil by the anodization method in an ethylene glycol electrolyte containing NH4F and deionized water. The α-Fe2O3 NTAs electrodes were characterized by field-emission scanning electron microscopy, grazing incidence X-ray diffraction and UV-vis absorbance spectra. As the anodization processed, the morphology of the foil transformed from nanoporous to nanotube arrays.The resulting α-Fe2O3 NTAs showed a pore diameter of 40 nm, thickness of 1.5 μm, and a minimum wall thickness of 10 nm. The photocatalytic activity of the α-Fe2O3 NTAs was evaluated by degradation of azo dye. The significant photocatalytic performance indicated that the α-Fe2O3 NTAs were an effective photocatalyst to decompose organic pollutants.

• Periodical: Advanced Materials Research (Volume 599)
• Pages: 145-150
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.599.145
• Online since: November 2012
• Authors: Gao Yue, Hong Wei Ni, Rong Sheng Chen, You Wei Li, Ji Hui Li
• Keywords: Nanotube Arrays, Photocatalysis, α-Fe₂O₃

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