非阻塞I/O
碳纳米管
热重分析
材料科学
氧化镍
氧化物
镍
热稳定性
透射电子显微镜
复合数
化学工程
纳米管
催化作用
复合材料
纳米技术
冶金
化学
有机化学
工程类
作者
Tae‐Hoon Kim,Min-Ho Park,Jiho Ryu,Cheol‐Woong Yang
标识
DOI:10.1017/s143192761301266x
摘要
Abstract 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.
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