Synthesis and Characterization of Single-Phase TiC Nanotubes, TiC Nanowires, and Carbon Nanotubes Equipped with TiC Nanoparticles

Abstract

Single-phase TiC nanotubes were successfully synthesized for the first time, by the reaction of carbon nanotubes (CNTs) with Ti powder at 1300 °C for 30 h. CNTs equipped with TiC nanoparticles and TiC nanowires were synthesized along with these single-phase TiC nanotubes, and the number ratio of single-phase TiC nanotubes to these other products was very small. According to the core and low-energy electron energy loss spectra taken from CNTs and the CNTs reacted with Ti powder, the ratio of Ti to C in TiC nanowire was higher than that in TiC nanotubes and the ratio in CNT equipped with TiC nanoparticles was the lowest. Three different types of TiC nanomaterials, TiC nanowires, TiC nanotubes, and CNTs equipped with TiC nanoparticles, as well as unreacted CNTs, were observed in this study, possibly because the concentration of Ti vapor decreased with increase in depth from the surface of CNT aggregates. A partly single-crystalline TiC nanotube was also observed.

Tailoring crystallinity and configuration of silica nanotubes by electron irradiation

“…In general, single-crystal ceramic nanowires, nanosheets, and nanotubes grow along directions parallel to crystal directions [29][30][31][32]. Although the SiO 2 nanotubes synthesized in this study are single crystalline, the SiO 2 nanotubes do not grow along crystal directions.…”

A generic bamboo-based carbothermal method for preparing carbide (SiC, B4C, TiC, TaC, NbC, TixNb1−xC, and TaxNb1−xC) nanowires

“…Interstitial carbides such as TiC, TaC, and NbC, are wellknown for their high melting points, high degree of hardness, thermal conductivity, electrical conductivity, and even superconductivity. 4,22,25,32,[41][42][43] The third sample is TiC, the most common interstitial carbide. A representative SEM image (Fig.…”

Synthesis of Inorganic Nanotubes

“…Nanotubes of Carbides and other Materials SiC nanowires, SiC/SiO 2 core-shell nanocables, and SiC nanotubes have been synthesized simultaneously by directly heating Si powder and multiwall carbon nanotubes . [221] Single-phase TiC nanotubes are prepared by the reaction of carbon nanotubes with Ti powder at 1300 8C for 30 h. [222] Silicon oxycarbide ceramic nanotubes can be obtained by the pyrolysis of polysilicone nanotubes using a sacrificial AM as a template. [223] In a typical synthesis, the AM templates were immersed in a mixture of low-molecular-weight silicone starting materials, such as {CH 3 (CH¼CH)SiO} n (n ¼ 3À7), named VC4, and a cyclic-type silicone bearing vinyl groups, and (CH 3 ) 3 Large-scale aligned silicon carbonitride nanotube arrays have been synthesized by microwave-plasma-assisted CVD using SiH 4 , CH 4 , and N 2 as precursors.…”