Oxidation Mechanism of Nickel Oxide/Carbon Nanotube Composite

被引：10

作者：

Kim, Tae-Hoon ^{[1
]}

Park, Min-Ho ^{[1
]}

Ryu, Jiho ^{[2
]}

Yang, Cheol-Woong ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 440746, Gyeonggi Do, South Korea

[2] Ajou Motor Coll, Dept Automobile Dev, Boryeong 355769, South Korea

来源：

MICROSCOPY AND MICROANALYSIS | 2013年 / 19卷

基金：

新加坡国家研究基金会;

关键词：

oxidation mechanism; NiO; CNT; composite; in situ heating; TEM; TGA; Raman spectroscopy; MULTIWALLED CARBON NANOTUBES; OXIDE;

D O I：

10.1017/S143192761301266X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oxidation mechanism and thermal stability of nickel oxide (NiO)/carbon nanotube (CNT) composites were investigated by examining composites with different NiO contents by thermogravimetric analysis and transmission electron microscopy (TEM). NiO acts as a catalyst in the oxidation of CNT in the composite. CNTs can be oxidized, even in a vacuum, by reducing NiO to nickel at temperatures lower than the normal oxidation temperature of CNTs. This phase transition was confirmed directly by in situ heating TEM observations. In air, reduction by CNT occurs simultaneously with reoxidation by gaseous O-2 molecules, and NiO maintains its phase. The thermal stability decreased with increasing NiO content because of defects in the CNT generated by the NiO loading.

引用

页码：202 / 206

页数：5

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