Synthesis and Characterization of Niobium-doped TiO(2) Nanotube Arrays by Anodization of Ti-20Nb Alloys

Well crystallized niobium-doped TiO(2) nanotube arrays (TiNbO-NT) were successfully synthesized via the anodization of titanium/niobium alloy sheets, followed with a heat treatment at 550 degree C for 2 h. Morphology analysis results demonstrated that both the titanium/niobium alloy microstructure a...

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Published inJournal of materials science & technology Vol. 28; no. 10; pp. 865 - 870
Main Authors Xu, Zhengchao, Li, Qi, Gao, Shian, Shang, Jianku
Format Journal Article
LanguageEnglish
Published 01.10.2012
Subjects
Anodizing
Arrays
Microstructure
Nanocomposites
Nanomaterials
Nanostructure
Titanium base alloys
Titanium dioxide
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Summary:Well crystallized niobium-doped TiO(2) nanotube arrays (TiNbO-NT) were successfully synthesized via the anodization of titanium/niobium alloy sheets, followed with a heat treatment at 550 degree C for 2 h. Morphology analysis results demonstrated that both the titanium/niobium alloy microstructure and the dissolution strength of electrolyte played major roles in the formation of nanotube structure. A single-phase microstructure was more favorable to the formation of uniform nanotube arrays, while modulating the dissolution strength of electrolyte was required to obtain nanotube arrays from the alloys with multi-phase microstructures. X-ray diffraction (XRD) and X-ray photoelectron (XPS) analysis results clearly demonstrated that niobium dopants (Nb(5+)) were successfully doped into TiO(2) anatase lattice by substituting Ti(4=) in this approach.
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ISSN:1005-0302