期刊
APPLIED SURFACE SCIENCE
卷 258, 期 2, 页码 641-648出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2011.07.032
关键词
Iron purification; XPS; MWCNT; Acid treatment; Camphor; Ferrocene
类别
资金
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES/BRAZIL) [0023/08-6]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP/BRAZIL) [2006/03525-3]
A detailed analysis by X-ray photoelectron spectroscopy was carried out on multi-walled carbon nanotube (MWCNT) surfaces after non-oxidative and oxidative purification treatments in liquid-phase. The MWCNT were produced by pyrolysis of camphor and ferrocene, that provides a high yield but with high iron contamination (similar to 15% wt). The elimination and/or oxidation of iron nanoparticles were monitored by Fe2p and O1s core level. Oxygen-based functional groups attachment was also investigated by C1s fitting. The effectiveness of each treatment in iron removal was evaluated by thermogravimetric analysis (TGA) and atomic absorption spectroscopy (AAS). The integrity of the MWCNT structure was verified by Raman spectroscopy (RS) and transmission electron microscopy (TEM). A purity degree higher than 98% was achieved only with non-oxidative treatments using sonification process. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据