Stabilizing single-walled carbon nanotubes by removal of residual metal catalysts

被引：32

作者：

Brukh, Roman ^{[1
,2
]}

Sae-Khow, Ornthida ^{[1
]}

Mitra, Somenath ^{[1
]}

机构：

[1] New Jersey Inst Technol, Dept Chem & Environm Sci, Newark, NJ 07102 USA

[2] Rutgers State Univ, Dept Chem, Newark, NJ 07102 USA

来源：

CHEMICAL PHYSICS LETTERS | 2008年 / 459卷 / 1-6期

关键词：

D O I：

10.1016/j.cplett.2008.05.026

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We demonstrate that the removal of residual metals can dramatically enhance the stability of single wall carbon nanotubes (SWCNTs). Metal catalysts are used in SWCNTs synthesis, and residual metals remain in the nanotube preparations. Here we studied the gas phase oxidation of SWCNTs and their metal-free counterpart at high temperatures. After metal removal, the activation energy for oxidation increased by 50% and the frequency factor by nearly four orders of magnitude. This increase in thermal stability was also supported by the fact that the temperature corresponding to the onset of oxidation for metal-free SWCNTs was 135 degrees C higher than the one containing residual metals. (c) 2008 Elsevier B. V. All rights reserved.

引用

页码：149 / 152

页数：4

共 23 条

[1]

Bhushan B., 2004, HDB NANOTECHNOLOGY

[2] Kinetics of carbon nanotube oxidation [J].

Brukh, Roman ;

Mitra, Somenath .

JOURNAL OF MATERIALS CHEMISTRY, 2007, 17 (07) :619-623

[3] Microwave-induced controlled purification of single-walled carbon nanotubes without sidewall functionalization [J].

Chen, Yuhong ;

Iqbal, Zafar ;

Mitra, Somenath .

ADVANCED FUNCTIONAL MATERIALS, 2007, 17 (18) :3946-3951

[4] Purification and characterization of single-wall carbon nanotubes [J].

Chiang, IW ;

Brinson, BE ;

Smalley, RE ;

Margrave, JL ;

Hauge, RH .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (06) :1157-1161

[5] MIGRATION OF SULFUR FROM ORGANIC TO THE INORGANIC PHASE UNDER HYDRODESULFURIZATION CONDITIONS [J].

DUNKERTON, LV ;

MITRA, S ;

PHILLIPS, JB ;

SMITH, GV ;

HINCKLEY, CC ;

WILTOWSKA, T .

FUEL, 1988, 67 (07) :967-972

[6] Crossed nanotube junctions [J].

Fuhrer, MS ;

Nygård, J ;

Shih, L ;

Forero, M ;

Yoon, YG ;

Mazzoni, MSC ;

Choi, HJ ;

Ihm, J ;

Louie, SG ;

Zettl, A ;

McEuen, PL .

SCIENCE, 2000, 288 (5465) :494-497

[7] Purification and isolation of SWNTs [J].

Gregan, E ;

Keogh, SM ;

Maguire, A ;

Hedderman, TG ;

Neill, LO ;

Chambers, G ;

Byrne, HJ .

CARBON, 2004, 42 (5-6) :1031-1035

[8]

Guozhong C., 2004, Nanostructures and nanomaterials: synthesis, properties and applications

[9] SINGLE-SHELL CARBON NANOTUBES OF 1-NM DIAMETER [J].

IIJIMA, S ;

ICHIHASHI, T .

NATURE, 1993, 363 (6430) :603-605

[10] Kinetics of oxidation in various forms of carbon [J].

Illeková, E ;

Csomorová, K .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2005, 80 (01) :103-108

← 1 2 3 →