介孔二氧化硅上双壁碳纳米管的选择性化学气相沉积合成

Selective chemical vapor deposition synthesis of double-wall carbon nanotubes on mesoporous silica.

作者信息

Ramesh Palanisamy, Okazaki Toshiya, Taniguchi Risa, Kimura Junichi, Sugai Toshiki, Sato Kenichi, Ozeki Yuji, Shinohara Hisanori

机构信息

CREST, Japan Science and Technology Agency, Nagoya University, Nagoya 464-8602, Japan.

出版信息

J Phys Chem B. 2005 Jan 27;109(3):1141-7. doi: 10.1021/jp0465736.

DOI:10.1021/jp0465736

PMID:16851073

Abstract

Double-wall carbon nanotubes (DWNTs) have been selectively synthesized over Fe/Co loaded mesoporous silica by catalytic chemical vapor deposition of alcohol. Several silica materials with desired pore diameter and morphology have been investigated for the DWNT growth. The diameter distribution and selectivity of the DWNT are found to depend on the reaction temperature, pore size, and thermal stability of the support material. A high-yield synthesis of DWNTs has been achieved at 900 degrees C over high-temperature stable mesoporous silica. The outer diameter of DWNTs is found to be in the range of 1.5-5.4 nm with a "d" spacing of 0.38 +/- 0.02 nm between inner and outer layers, which is much larger than those of multiwall carbon nanotubes.

摘要

通过醇的催化化学气相沉积法，在负载铁/钴的介孔二氧化硅上选择性地合成了双壁碳纳米管（DWNTs）。为了实现DWNTs的生长，研究了几种具有所需孔径和形态的二氧化硅材料。发现DWNTs的直径分布和选择性取决于反应温度、孔径以及载体材料的热稳定性。在900℃下，在高温稳定的介孔二氧化硅上实现了DWNTs的高产率合成。DWNTs的外径在1.5-5.4nm范围内，内外层之间的“d”间距为0.38±0.02nm，这比多壁碳纳米管的间距大得多。