Evaluation of the Titanium Substrate Effect on the Morphology of Anodic TiO₂ Nanotubes

Abstract

We report the synthesis of novel titanium dioxide nanotube arrays (TNAs) via an anodization process using five different kinds of titanium foils as working electrodes. This reveals that the morphology of TNAs in impacted by the purity, conductivity, and mechanical properties of the titanium sheets. Under the same electrochemical conditions, when titanium foil with purity of 99.7% was used as the working electrode, the TNAs with maximum aspect ratio was obtained compared to that prepared by low purity metal substrate. We also track and observe the morphology of the secondary oxidized TNAs, and demonstrate the relationship with different purites of Ti foils. The fact that the adhesion of anodic TNAs to Ti substrates closely relates to the residual stress of substrates is also revealed. Specifically, cathodic pulse doping results show that the black appearance of TNAs is strongly dependent on the purity of different Ti foils.

Multifunctional TiO2 Nanotube-Matrix Composites with Enhanced Photocatalysis and Lithium-Ion Storage Performances

“…The morphology of the as-annealed secondary oxidized TiO 2 nanotube (TiO 2 NT) is shown in Figure S1 . Typically, a regular network structure is formed on the top of the TiO 2 nanotube, resulting in its large specific surface area [ 25 ]. The top of the TiO 2 NT array has a double-layer honeycomb structure, which is conducive to photocatalysis and energy storage [ 25 , 26 , 27 ].…”

“…Typically, a regular network structure is formed on the top of the TiO 2 nanotube, resulting in its large specific surface area [ 25 ]. The top of the TiO 2 NT array has a double-layer honeycomb structure, which is conducive to photocatalysis and energy storage [ 25 , 26 , 27 ]. Therefore, we use the secondary oxidized TiO 2 nanotube (TiO 2 NT) as a matrix to prepare high-performance catalyst and lithium battery anode.…”

“…TiO2 nanotube, resulting in its large specific surface area [25]. The top of the TiO2 NT array has a double-layer honeycomb structure, which is conducive to photocatalysis and energy storage [25][26][27].…”

Effect of Titanium Matrix Structure on Growth Morphology of Anodized TiO2 Nanotube Arrays for Applications in Photoelectrochemical Performances

“…14 By exploring the changes of the TNTs morphology of titanium sheets with different purities after anodization, Zhang et al showed that titanium dioxide nanotubes are closely related to the purity, electrical conductivity, and mechanical properties of titanium sheets. 15 From these, we can see the improvement effect of TNTs ordered morphology for optoelectronic applications.…”

“…It is concluded that the anodizing voltage has a significant effect on the morphology, structure, photoelectrochemical properties, and hydrogen production of nanometer titanium dioxide, while Cao et al explored the effects of different F-ion concentrations and anodizing times on the morphology of nanotubes and evaluated the battery performance . By exploring the changes of the TNTs morphology of titanium sheets with different purities after anodization, Zhang et al showed that titanium dioxide nanotubes are closely related to the purity, electrical conductivity, and mechanical properties of titanium sheets . From these, we can see the improvement effect of TNTs ordered morphology for optoelectronic applications.…”