Formation of Titanium Oxide Nanotube

Abstract

Nanotubes composed of various materials such as carbon, boron nitride, and oxides have been studied recently. In this report, the discovery of a new route for the synthesis of a nanotube made of titanium oxide is presented. Needle-shaped TiO2 crystals (anatase phase) with a diameter of ≈8 nm and a length of ≈100 nm were obtained when sol−gel-derived fine TiO2-based powders were treated chemically (e.g., for 20 h at 110 °C) with a 5−10 M NaOH aqueous solution. It was found by observation using a transmission electron microscope that the needle-shaped products have a tube structure. The TiO2 nanotubes have a large specific surface area of ≈400 m2·g-1. TiO2 nanotubes obtained in the present work are anticipated to have great potential for use in the preparation of catalysts, adsorbants, and deodorants with high activities, because their specific surface area is greatly increased. If metallic-, inorganic-, or organic-based materials can be inserted into the TiO2 nanotubes, novel characteristics such as electric, electromagnetic, or chemical properties may be induced in the TiO2 materials.

Reinforcement of flowable dental composites with titanium dioxide nanotubes

“…1.1). Titania nanotubes (n-TiO 2 ) can be fabricated using several techniques, including the assisted-template method [27], sol-gel method [28], electrochemical anodic oxidation method [29] and hydrothermal treatment [30]. …”

“…The temperature was controlled using a T-thermocouple and a temperature controller (Omega HRC5A). Samples of n-TiO 2 were synthesized using the alkaline hydrothermal technique described earlier by Kasuga et al [28]. Basically, the experiment was started by dispersing 0.24 g strontium acetate powder in 30 mL of 10 M NaOH solution and stirring for 24 h, followed by addition of 2 g of commercially available TiO 2 nanopowder and stirring for another 24 h. The mixture was transferred to a Teflon-lined stainless steel autoclave for hydrothermal treatment.…”

Physico-chemical properties and possible photocatalytic applications of titanate nanotubes synthesized via hydrothermal method

“…Since Kasuga et al [1] described a novel hydrothermal method for titanate nanotubes (TNTs) formation, the investigations on preparation and properties of these species have attracted attention of numerous researchers. More than a decade later, the structure of TNTs as well as their properties are still a problem under discussion.…”

Study on the Preparation of Nanosized Titanium Dioxide with Tubular Structure by Hydrothermal Method and Their Photocatalytic Activity

“…Lin [12] reported that TiO 2 powders used as the provider of raw material were corroded by strong acid, and the formation mechanism of nanotubes were in a dissolutionprecipitation-growing procedure. However, Wang et al [13] and T. Kasuga et al [14] discussed that during treatment with NaOH solution, some Ti-O bonds of the TiO 2 precursor were broken, leading to the formation of lamellar fragments that were the intermediate phase in the formation process of the nanotubes material. The tubular structure was achieved by rolling slowly after the acidic post-treatment process, and therefore the acid rinsing step had become very important during the TiO 2 nanotubes formation process.…”