Anodic formation of aligned and bamboo-type TiO2 nanotubes at constant low voltages

Lin, Chan; Chen, Shougang; Cao, Lixin

doi:10.1016/j.mssp.2012.05.009

Cited by 17 publications

(8 citation statements)

References 33 publications

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“…Upon increasing the anodization time, the nodes in the bamboo structure became clearer and tended to grow along the nanotubes in all samples, revealing the impact of anodization time on the morphology of the obtained nanostructures. This is in line with the ion–ion interaction reported in the literature. , To this end, the bamboolike structure could provide superior interconnectivity and high surface area that are very important in photoelectrochemical water splitting applications. − However, the diameter of the obtained nanotubular structure in TMF31 and TMF55 samples slightly increased with increasing the anodization time, while the nanotubes wall thickness was not affected by increasing the anodization time, as shown in Table S1. Additionally, the average length of the nanotubes on TMF31 samples reached its maximum after 4 h of anodization then tended to be almost constant (see Table S1).…”

Section: Resultssupporting

confidence: 83%

“…This is in line with the ion−ion interaction reported in the literature. 44,45 To this end, the bamboolike structure could provide superior interconnectivity and high surface area that are very important in photoelectrochemical water splitting applications. 46−49 However, the diameter of the obtained nanotubular structure in TMF31 and TMF55 samples slightly increased with increasing the anodization time, while the nanotubes wall thickness was not affected by increasing the anodization time, as shown in Table S1.…”

Section: Resultsmentioning

confidence: 99%

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Ternary Ti–Mo–Fe Nanotubes as Efficient Photoanodes for Solar-Assisted Water Splitting

et al. 2021

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Designing efficient and stable water splitting photocatalysts is an intriguing challenge for energy conversion systems. We report on the optimal fabrication of perfectly aligned nanotubes on trimetallic Ti–Mo–Fe alloy with different compositions prepared via the combination of metallurgical control and facile electrochemical anodization in organic media. The X-ray diffraction (XRD) patterns revealed the presence of composite oxides of anatase TiO2 and magnetite Fe3O4 with better stability and crystallinity. With the optimal alloy composition Ti–(5.0 atom %) Mo–(5.0 atom %) Fe anodized for 16 h, enhanced conductivity, improved photocatalytic performance, and remarkable stability were achieved in comparison with Ti–(3.0 atom %) Mo–(1.0 atom %) Fe samples. Such optimized nanotube films attained an enhanced photocatalytic activity of ∼0.272 mA/cm2 at 0.9 VSCE, which is approximately 4 times compared to the bare TiO2 nanotubes fabricated under the same conditions (∼0.041 mA/cm2 at 0.9 VSCE). That was mainly correlated with the emergence of Mo and Fe impurities within the lattice, providing excess charge carriers. Meanwhile, the nanotubes showed outstanding stability with a longer electron lifetime. Moreover, carrier density variations, lower charge transfer resistance, and charge carriers dynamics features were demonstrated via the Mott–Schottky and electrochemical impedance analyses.

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Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Ternary Ti–Mo–Fe Nanotubes as Efficient Photoanodes for Solar-Assisted Water Splitting

et al. 2021

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“…Bamboo T-NTA structures can be formed through electrolyte chemistry modifications as well as alternating applied bias. The banded, bamboo-like structure can occur in aqueous or high water content glycerol electrolyte solutions [ 62 , 63 ]. However, glycerol solutions containing glycerol/H 2 O ratios higher than 9:1 do not exhibit nodes due to the lack of periodical current fluctuations at the T-NTA surface.…”

Section: Introductionmentioning

confidence: 99%

Self-Ordered Titanium Dioxide Nanotube Arrays: Anodic Synthesis and Their Photo/Electro-Catalytic Applications

et al. 2013

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Metal oxide nanotubes have become a widely investigated material, more specifically, self-organized titania nanotube arrays synthesized by electrochemical anodization. As a highly investigated material with a wide gamut of applications, the majority of published literature focuses on the solar-based applications of this material. The scope of this review summarizes some of the recent advances made using metal oxide nanotube arrays formed via anodization in solar-based applications. A general methodology for theoretical modeling of titania surfaces in solar applications is also presented.

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“…The dissolution of the uoride rich layer placed between the nanotubes walls (TiF 4 ), according to reactions (2) and ( 3), increases the inter-space distance between the nanotubes. Therefore, the electrolyte accesses throughout the inter-space, and promotes the growth of a new barrier layer between the walls of adjacent nanotubes to form the ribs, in accordance with reaction (4): 27,35,37…”

Section: Film Morphologymentioning

confidence: 94%

TiO₂nanotubes with tunable morphologies

et al. 2014

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Titanium anodic oxide layers with a bottle shaped nanotubular structure have been grown in an electrolyte containing NH 4 F, applying voltage steps. The grown layers were analyzed using scanning and transmission electron microscopy (SEM and TEM), and Rutherford backscattering spectroscopy (RBS). The results show that a concentration of 0.15 M of NH 4 F in the anodizing bath, and a step of 10 to 20 V produces an oxide with a double morphology comprised of nanotubes at the oxide/metal interface and nanopores at the oxide/electrolyte interface of the anodic layer. Higher concentration of F À in the bath, 0.3 and 0.45 M NH 4 F, enhanced the chemical dissolution of the anodic layer resulting in nanotubular structures along the oxide layer. Therefore, the bottle shaped nanotubular structures that show a well defined morphology are obtained in a bath containing a concentration of 0.3 M NH 4 F and applying a voltage step of 10-20 V.

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Anodic formation of aligned and bamboo-type TiO2 nanotubes at constant low voltages

Cited by 17 publications

References 33 publications

Ternary Ti–Mo–Fe Nanotubes as Efficient Photoanodes for Solar-Assisted Water Splitting

Ternary Ti–Mo–Fe Nanotubes as Efficient Photoanodes for Solar-Assisted Water Splitting

Self-Ordered Titanium Dioxide Nanotube Arrays: Anodic Synthesis and Their Photo/Electro-Catalytic Applications

TiO₂nanotubes with tunable morphologies

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Anodic formation of aligned and bamboo-type TiO2 nanotubes at constant low voltages

Cited by 17 publications

References 33 publications

Ternary Ti–Mo–Fe Nanotubes as Efficient Photoanodes for Solar-Assisted Water Splitting

Ternary Ti–Mo–Fe Nanotubes as Efficient Photoanodes for Solar-Assisted Water Splitting

Self-Ordered Titanium Dioxide Nanotube Arrays: Anodic Synthesis and Their Photo/Electro-Catalytic Applications

TiO2nanotubes with tunable morphologies

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TiO₂nanotubes with tunable morphologies