A voltage-dependent investigation on detachment process for free-standing crystalline TiO2 nanotube membranes
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TiO2 nanotube (TNT) arrays have attracted considerable scientific interests because of their photoelectric properties and technological importance for diverse applications as solar cells [1, 2, 3, 4], photocatalysis [5, 6, 7], gas sensors , hydrogen generation from water splitting , and composite nano-membranes [9, 10]. Among various synthesis methods, electrochemical anodization is an excellent approach to fabricate TNT arrays due to its simplicity, low cost, and tunable morphology . However, the nature of as-prepared TNT membrane adhered on opaque Ti foil restricts their feasibility for the applications such as tube filling [9, 10], biofiltration, flow-through photocatalytic reactions , and front illumination in solar cells [2, 3, 4]. After detachment from the substrate, free-standing TNT membranes show high performance due to the absence of a blocking layer [2, 4]. The TNT membrane can be directly used or attached on foreign substrates for the above...
KeywordsAnatase TiO2 Ammonium Fluoride Detachment Process View Scanning Electron Microscope Detachment Mechanism
The authors are grateful to Zekija Ramic and Ragnar D. Johansen for help of the experimental set up, Tormod Vinsand and Knut Aasmundtveit for help with SEM, Vishnukanthan Venkatachalapathy in MiNalab of Oslo University for help with XRD chractarization. The author GHL also acknowledge financial support from KD program at the Vestfold University College, Oslofjord Fund and NorFab in Norway.
- 29.Cheng Q, Ahmad W, Liu GH, Wang KY (2011) In: Proc. of 11th IEEE international conference on nanotechnology, Portland Marriott, August 15–18, 2011, Portland, OR, p 1589Google Scholar