Evaluation of residual iron in carbon nanotubes purified by acid treatments

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorInstituto Nacional de Pesquisas Espaciais (INPE)
dc.contributorInstituto Tecnológico de Aeronáutica (ITA)
dc.date.accessioned2014-05-20T15:33:09Z
dc.date.accessioned2022-10-05T17:13:59Z
dc.date.available2014-05-20T15:33:09Z
dc.date.available2022-10-05T17:13:59Z
dc.date.created2014-05-20T15:33:09Z
dc.date.issued2011-11-01
dc.identifierApplied Surface Science. Amsterdam: Elsevier B.V., v. 258, n. 2, p. 641-648, 2011.
dc.identifier0169-4332
dc.identifierhttp://hdl.handle.net/11449/41864
dc.identifier10.1016/j.apsusc.2011.07.032
dc.identifierWOS:000296525800001
dc.identifier4378078337343660
dc.identifier0000-0001-8338-4879
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3912750
dc.description.abstractA 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.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationApplied Surface Science
dc.relation4.439
dc.relation1,093
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectIron purification
dc.subjectXPS
dc.subjectMWCNT
dc.subjectAcid treatment
dc.subjectCamphor
dc.subjectFerrocene
dc.titleEvaluation of residual iron in carbon nanotubes purified by acid treatments
dc.typeArtigo


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