Internal anodization of porous Ti to fabricate immobilized TiO2 nanotubes with a high specific surface area

Surface Modification of TiO2 Nanotubes Prepared by Porous Titanium Anodization via Hydrothermal Reaction: A Method for Synthesis High-Efficiency Adsorbents of Recovering Sr Ions

“…According to previous research, a major factor that influences the inconsistency on the internal and surface anodic oxidation is mass transfer, which may affect both the actual contact efficiency with the electrolyte and the reaction rate of the whole electrochemical system. − Although the morphology of TNTs is different from region to region, nanotubes have been formed on the surface and interior of porous titanium after anodization, which is obviously beneficial for increasing the specific surface area of porous titanium.…”

“…Thus, the presented current is the sum of the local currents, covering the interdivision between the second and third stages. 6,47 Besides, it can be seen that the local fluctuation of the curve is large. This phenomenon can be explained that the porous titanium is loose inside and has an uneven local distribution, resulting in current instability.…”

“…The reason is related to the specific surface area, which of porous titanium is tens or even hundreds of times higher than that of titanium foil. 47 As a result, the porous titanium is fully exposed to the electrolyte, and the electrochemical corrosion−oxidation process is accelerated, resulting in the current enlargement during the anodization process.…”

“…The explanation is the difference in mass transfer and local current, which leads to inconsistent fabrication of TNTs in different regions. Thus, the presented current is the sum of the local currents, covering the interdivision between the second and third stages. , …”

“…In previous studies, we found that the current generated by porous titanium as an anode was obviously larger than that of titanium foil under the same anodic oxidation conditions. The reason is related to the specific surface area, which of porous titanium is tens or even hundreds of times higher than that of titanium foil . As a result, the porous titanium is fully exposed to the electrolyte, and the electrochemical corrosion–oxidation process is accelerated, resulting in the current enlargement during the anodization process.…”