Journal
MATERIALS RESEARCH BULLETIN
Volume 151, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2022.111829
Keywords
Anodization; Free-standing; Detachment; Aged electrolyte; TiO < sub > 2 <; sub > nanotubes
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Funding
- Ministry of Science and Technology Taiwan [MOST 109-2221-E-029-006]
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An independent TiO2 nanotube layer was prepared through a three-step process that showed a complete structure and mechanical hardness to resist detachment, demonstrating excellent potential for future applications.
A free-standing TiO2 nanotube layer (FSL-TiO2NTs) was prepared via a three-step process, including the electrochemical anodization of Ti foil, calcination at 500 degrees C for 2 h in air, and detachment with 5.0 wt.% H2O2. The physicochemical properties of TiO2NTs grown on a Ti substrate (TiO2NTs/Tisub) and FSL-TiO2NTs obtained from electrolytes aged for different times (i.e., 0, 4, 8, or 12 h) were characterized by current density measurements, FE-SEM, TEM, XRD, UV-Vis absorbance spectroscopy and transient photocurrent measurement. In general, TiO2NTs synthesized in electrolytes aged for 8 and 12 h possessed not only a highly-ordered structure but also sufficient mechanical hardness to resist the detachment drag, resulting in FSL-TiO2NTs with a complete nano tubes layer structure. The materials prepared in this work demonstrate excellent potential for future applications.
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