Journal ArticleDOI
Preparation and structure analysis of titanium oxide nanotubes
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In this paper, the atomic structure of the synthesized tubular material is imaged by high-resolution transmission electron microscopy (HRTEM), and the composition of individual tubular structures is determined using selected area energy dispersive X-ray spectroscopy (EDX).Abstract:
Well crystallized nanoscale tubular materials have been synthesized via the reaction of TiO2 crystals of either anatase or rutile phase and NaOH aqueous solution. The atomic structure of the synthesized tubular material is imaged by high-resolution transmission electron microscopy (HRTEM), and the composition of individual tubular structures is determined using selected area energy dispersive X-ray spectroscopy (EDX). Our results show that the tubular materials are well crystallized tubes with an average diameter of about 9 nm and little dispersion, and are composed of mainly titanium and oxygen. The atomic ratio of O/Ti is found, however, to vary from tube to tube. Detailed electron and x-ray diffraction studies show that the structure of our titanium oxide nanotubes do not agree with those made of TiO2 crystals with either anatase or rutile phase. HRTEM observations revealed that the titanium oxide nanotubes usually have multiple shells, in analogy with multiwalled carbon nanotubes, but the shell spacin...read more
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Layered Protonated Titanate Nanosheets Synthesized with a Simple One-Step, Low-Temperature, Urea-Modulated Method as an Effective Pollutant Adsorbent
TL;DR: The LPTNs prove to be a promising adsorbent in wastewater treatment for adsorption removal of metal ions or cationic organic dyes.
Journal ArticleDOI
Electronic, optical, and magnetic properties of Fe-intercalated H2Ti3O7 nanotubes: First-principles calculations and experiments
TL;DR: In this paper, a stable structure exists for the Fe-intercalated H2Ti3O7 structure with a formula FeHTi6O14, and the intercalated Fe atoms in the interlayer region of FeH2Ti6O7 form a one-dimensional (1D) Fe chain along [010], and the overlapped Fe-3d(z)(2) orbitals along the channel result in a delocalized 1D band below the Fermi level extending the absorption edge of FeHCN 14 well into the visible region.
Journal ArticleDOI
Photocatalytic removal of NO and NO2 using titania nanotubes synthesized by hydrothermal method
Nhat Huy Nguyen,Hsun-Ling Bai +1 more
TL;DR: A significant enhancement was observed on the total NOx removal efficiency by TNT calcined at 500°C for both NO and NO2 photocatalytic reaction, which could be attributed to its high anatase crystallinity as well as high surface area.
Journal ArticleDOI
Effects of thermal treatment of nanostructured trititanates on their crystallographic and textural properties
Edisson Morgado,Edisson Morgado,Marco A.S. de Abreu,Gustavo Torres Moure,Bojan A. Marinkovic,P.M. Jardim,Antonio S. Araujo +6 more
TL;DR: In this paper, a detailed study on the reduction of the interlayer distance in nanostructured titanates (TTNT) samples upon thermal treatment was carried out, which revealed the formation of an intermediate TTNT hexatitanate, just before phase transformation into the corresponding TiO{sub 2} polymorphs and/or titanate crystals.
Journal ArticleDOI
Highly sensitive and pulse-like response toward ethanol of Nb doped TiO2 nanorods based gas sensors
TL;DR: In this article, high-crystalline TiO2 and 3-wt% Nb-doped TiO 2 nanorods were synthesized by a low-temperature surfactant directed hydrolysis method followed by calcination at 600-900°C.
References
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Journal ArticleDOI
Helical microtubules of graphitic carbon
TL;DR: Iijima et al. as mentioned in this paper reported the preparation of a new type of finite carbon structure consisting of needle-like tubes, which were produced using an arc-discharge evaporation method similar to that used for fullerene synthesis.
Journal ArticleDOI
Room-temperature transistor based on a single carbon nanotube
TL;DR: In this paper, the fabrication of a three-terminal switching device at the level of a single molecule represents an important step towards molecular electronics and has attracted much interest, particularly because it could lead to new miniaturization strategies in the electronics and computer industry.
Book
Physical properties of carbon nanotubes
TL;DR: In this paper, an introductory textbook for graduate students and researchers from various fields of science who wish to learn about carbon nanotubes is presented, focusing on the basic principles behind the physical properties and giving the background necessary to understand the recent developments.
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Science of fullerenes and carbon nanotubes
TL;DR: In this paper, the authors present a detailed overview of the properties of Fullerenes and their properties in surface science applications, such as scanning tunnel microscopy, growth and fragmentation studies, and chemical synthesis.
Journal ArticleDOI
Boron Nitride Nanotubes
Nasreen G. Chopra,R. J. Luyken,K. Cherrey,Vincent H. Crespi,Marvin L. Cohen,Steven G. Louie,Alex Zettl +6 more
TL;DR: Electron energy-loss spectroscopy on individual tubes yielded B:N ratios of approximately 1, which is consistent with theoretical predictions of stable BN tube structures.