Facile fabrication of freestanding through-hole ZrO2 nanotube membranes via two-step anodization methods |
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| Authors: | Dong Fang Suqin Liu Zhiping Luo Chuanxi Xiong Weilin Xu |
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| Institution: | 1. Key Lab of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education, school of material science and engineering, Wuhan Textile University, 430073, Wuhan, China;2. College of Chemistry & Chemical Engineering, Central South University, Changsha 410083, People''s Republic of China;3. Microscopy and Imaging Center and Materials Science and Engineering Program, Texas A&M University, College Station, TX 77843, USA |
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| Abstract: | Highly ordered freestanding tubular zirconia (ZrO2) membrane was prepared via an electrochemical anodization of zirconium (Zr) substrate in non-aqueous electrolytes (mixture of formamide and glycerol (weight ratio = 1:1) containing 1 wt% NH4F and 3 wt% H2O). Two methods were used to fabricate the two-end opened ZrO2 membranes, one is a potential shock method and another is a reducing potential method. The two-end opened ZrO2 membrane was produced through the detachment of the existing self-organized ZrO2 tubular layer from Zr substrate or sub tubular layer. The microstructures and morphologies of the samples were studied by scanning electron microscopy and the growth mechanisms of the two-end opened ZrO2 nanotube arrays were investigated. |
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