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Issue 13, 2011
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Freestanding ZrO2 nanotube membranes made by anodic oxidation and effect of heat treatment on their morphology and crystalline structure

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Abstract

An integrated freestanding zirconia (ZrO2) membrane was fabricated via a two-step electrochemical anodization with a zirconium (Zr) foil, followed by a simple and safe detachment of the formed ZrO2 membrane. The resulting membrane consists of highly ordered, vertically aligned, and one-side open ZrO2 nanotube arrays. The effect of heat treatment on the morphology and crystalline structure of the integrated freestanding ZrO2 membranes was studied using scanning electron microscopy, transmission electron microscopy and X-ray diffraction. These results showed that the nanotubes were stable to annealing at 500 °C and then gradually transformed to wires along their long axis from 600 to 900 °C. The as-prepared samples possessed amorphous structures, while both monoclinic and tetragonal phases were found after annealing at a temperature between 400 °C and 900 °C. The present study not only demonstrates a facile approach to produce high quality ZrO2 membranes in a simple manner, but also provides valuable insights into the temperature dependent morphology and crystalline transformations in anodic ZrO2 nanotube arrays.

Graphical abstract: Freestanding ZrO2 nanotube membranes made by anodic oxidation and effect of heat treatment on their morphology and crystalline structure

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Publication details

The article was received on 12 Nov 2010, accepted on 24 Jan 2011 and first published on 17 Feb 2011


Article type: Paper
DOI: 10.1039/C0JM03903A
Citation: J. Mater. Chem., 2011,21, 4989-4994
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    Freestanding ZrO2 nanotube membranes made by anodic oxidation and effect of heat treatment on their morphology and crystalline structure

    D. Fang, K. Huang, Z. Luo, Y. Wang, S. Liu and Q. Zhang, J. Mater. Chem., 2011, 21, 4989
    DOI: 10.1039/C0JM03903A

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