Release of N2 from the carbon nanotubes via high-temperature annealing

被引：102

作者：

Choi, HC

Bae, SY

Jang, WS

Park, J ^{[1
]}

Song, HJ

Shin, HJ

Jung, H

Ahn, JP

机构：

[1] Korea Univ, Dept Chem, Jochiwon 339700, South Korea

[2] Pohang Univ Sci & Technol, Pohang Accelerator Lab, Pohang 790784, South Korea

[3] Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea

[4] Korea Inst Sci & Technol, Nano Mat Res Ctr, Seoul 136791, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 05期

关键词：

D O I：

10.1021/jp046098b

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：

Nitrogen (N)-doped carbon nanotubes (CNTs) were heated to 1000 degreesC under an ultrahigh vacuum. X-ray photoelectron spectroscopy (XPS) and X-ray absorption near-edge structure (XANES) reveal three different N structures; graphitelike, pyridine-like, and molecular N-2. The vibrationally resolved XANES peaks of N-2 were first observed, suggesting the existence of molecular N-2 as intercalated and trapped forms. The annealing process can decrease the average N content from 6.3 at. % to 3.3 at. %, mainly by releasing molecular N-2. Electron energy-loss spectroscopy (EELS) confirms that the annealing releases molecular N-2 from the CNTs.

引用

收藏

页码：1683 / 1688

页数：6

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