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Journal ArticleDOI

Titania Nanotubes Prepared by Chemical Processing.

11 Jan 2000-ChemInform (John Wiley & Sons, Ltd)-Vol. 31, Iss: 2
TL;DR: In this paper, a method for the synthesis of needle-shaped titanium oxide (TiO2) nanotubes was proposed. But the method was not suitable for the case of amorphous raw materials, and it required the use of distilled water and HCl aqueous solution.
Abstract: We report a new method for the synthesis of titanium oxide (TiO2) nanotubes. When anatase-phase- or rutile-phase-containing TiO2 was treated with an aqueous solution of 5–10 M NaOH for 20 h at 110 °C and then with HCl aqueous solution and distilled water, needle-shaped TiO2 products were obtained (diameter ≈ 8 nm, length ≈ 100 nm). The needle-shaped products are nanotubes with inner diameters of approximately 5 nm and outer diameters of approximately 8 nm. The formation mechanism of titania nanotubes is discussed in terms of the detailed observation of the products by transmission electron microscopy: the crystalline raw material is first converted to an amorphous product through alkali treatment, and subsequently, titania nanotubes are formed after treatment with distilled water and HCl aqueous solution.
Citations
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Journal ArticleDOI
05 May 2017-ACS Nano
TL;DR: In this article, ultrathin nanoribbons of sodium titanate (M-NTO, NaTi1.5O8.3) and potassium titanate were successfully synthesized by a simultaneous oxidation and alkalization process of Ti3C2 MXene.
Abstract: Sodium and potassium ion batteries hold promise for next-generation energy storage systems due to their rich abundance and low cost, but are facing great challenges in optimum electrode materials for actual applications. Here, ultrathin nanoribbons of sodium titanate (M-NTO, NaTi1.5O8.3) and potassium titanate (M-KTO, K2Ti4O9) were successfully synthesized by a simultaneous oxidation and alkalization process of Ti3C2 MXene. Benefiting from the suitable interlayer spacing (0.90 nm for M-NTO, 0.93 nm for M-KTO), ultrathin thickness (<11 nm), narrow widths of nanoribbons (<60 nm), and open macroporous structures for enhanced ion insertion/extraction kinetics, the resulting M-NTO exhibited a large reversible capacity of 191 mAh g–1 at 200 mA g–1 for sodium storage, higher than those of pristine Ti3C2 (178 mAh g–1) and commercial TiC derivatives (86 mAh g–1). Notably, M-KTO displayed a superior reversible capacity of 151 mAh g–1 at 50 mA g–1 and 88 mAh g–1 at a high rate of 300 mA g–1 and long-term stable cycl...

489 citations

Journal ArticleDOI
TL;DR: Titanium oxide nanotubes were successfully grown from a titanium plate by direct anodic oxidation with 0.2 wt % hydrofluoric acid being the supporting electrolyte and look like honeywell with the structure similar to that of porous alumina obtained by the same technique.
Abstract: Titanium oxide nanotubes were successfully grown from a titanium plate by direct anodic oxidation with 0.2 wt % hydrofluoric acid being the supporting electrolyte. These nanotubes are of uniform size and are well-aligned into high-density arrays. They look like honeywell with the structure similar to that of porous alumina obtained by the same technique. TiO2 anatase phase was identified by X-ray diffraction. Significant blue-shift in the spectrum of UV−vis absorption was observed. The mechanism of the novel, simple, and direct growth of the nanotubes was postulated. To investigate their potentials in environmental applications, degradation of pentachlorophenol (PCP) in aqueous solution was carried out using photoelectrocatalytic (PEC) processes, comparing with electrochemical process (EP) and photocatalytic (PC). A significant photoelectrochemical synergetic effect was observed. The kinetic constant of PEC degradation of PCP using TiO2 nanotubes electrode was 86.5% higher than that using TiO2 film electr...

423 citations

Journal ArticleDOI
06 Aug 2008-ACS Nano
TL;DR: PbS quantum dots were prepared on the inside and outside surfaces of TiO(2) nanotubes by using thiolactic acid as an organic linker and characterized by TEM, as well as Raman, FT-IR, and UV-vis spectroscopy.
Abstract: PbS quantum dots (PbS QDs) were prepared on the inside and outside surfaces of TiO2 nanotubes by using thiolactic acid as an organic linker. The sizes of PbS QDs were controlled by employing a dip coating process to anchor the PbS QDs onto the TiO2 nanotubes. The PbS QDs with diameters of 2−10 nm were obtained by adjusting the concentration of thiolactic acid. TiO2 nanotubes with PbS QDs located only inside the nanotubes were prepared by first coating the tubes with the double-chain cationic surfactant DDAB. The PbS QDs supported on TiO2 nanotubes were characterized by TEM, as well as Raman, FT-IR, and UV−vis spectroscopy.

198 citations


Cites methods from "Titania Nanotubes Prepared by Chemi..."

  • ...The peak at 460 cm 1 is assigned to the Ti O bending mode, involving six coordinated oxygen atoms.(28) Com-...

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Journal ArticleDOI
TL;DR: The results showed that the large specific surface area, high pore volume, thin tube wall, and optimal tube length would be important factors to achieve the good performance of TNT films.

172 citations


Cites background or methods from "Titania Nanotubes Prepared by Chemi..."

  • ...[8] used a hydrothermal process for treatment of titania particles in NaOH solution at 110 °C and then washed with water and hydrochloric acid to form titania nanotubes....

    [...]

  • ...In recent years, considerable efforts have been focused on new techniques for synthesizing titania with a unique nanoarchitecture consisting of vertically-oriented, immobilized, highly-ordered and high-aspect ratio nanotubes such as hydrothermal treatment [8,9], template synthesis [10], and anodic oxidation [11]....

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Journal ArticleDOI
TL;DR: In this article, the properties of inorganic nanotubes, including mechanical, electronic and optical properties, are described in brief, and some potential applications of the nanoteutubes in tribology, protection against impact, catalysts, batteries, etc.
Abstract: Following the discovery of carbon fullerenes and carbon nanotubes, it was hypothesized that nanoparticles of inorganic compounds with layered (two–dimensional) structure, such as MoS2, will not be stable against folding and form nanotubes and fullerene–like structures: IF. The synthesis of numerous other inorganic nanotubes has been reported in recent years. Various techniques for the synthesis of inorganic nanotubes, including high–temperature reactions and strategies based on ‘chemie douce’ (soft chemistry, i.e. low–temperature) processes, are described. First–principle, density functional theory based calculations are able to provide substantial information on the structure and properties of such nanotubes. Various properties of inorganic nanotubes, including mechanical, electronic and optical properties, are described in brief. Some potential applications of the nanotubes in tribology, protection against impact, (photo)catalysis, batteries, etc., are discussed.

167 citations

References
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Journal ArticleDOI
TL;DR: In this paper, a method for the synthesis of needle-shaped titanium oxide (TiO2) nanotubes was proposed. But the method was not suitable for the case of amorphous raw materials, and it required the use of distilled water and HCl aqueous solution.
Abstract: We report a new method for the synthesis of titanium oxide (TiO2) nanotubes. When anatase-phase- or rutile-phase-containing TiO2 was treated with an aqueous solution of 5–10 M NaOH for 20 h at 110 °C and then with HCl aqueous solution and distilled water, needle-shaped TiO2 products were obtained (diameter ≈ 8 nm, length ≈ 100 nm). The needle-shaped products are nanotubes with inner diameters of approximately 5 nm and outer diameters of approximately 8 nm. The formation mechanism of titania nanotubes is discussed in terms of the detailed observation of the products by transmission electron microscopy: the crystalline raw material is first converted to an amorphous product through alkali treatment, and subsequently, titania nanotubes are formed after treatment with distilled water and HCl aqueous solution.

1,490 citations