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  Combined XPS and TPD study of oxygen-functionalized carbon nanofibers grown on sintered metal fibers

Rosenthal, D., Ruta, M., Schlögl, R., & Kiwi-Minsker, L. (2010). Combined XPS and TPD study of oxygen-functionalized carbon nanofibers grown on sintered metal fibers. Carbon, 48(6), 1835-1843. Retrieved from http://dx.doi.org/10.1016/j.carbon.2010.01.029.

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 Urheber:
Rosenthal, Dirk1, Autor           
Ruta, Marina, Autor
Schlögl, Robert1, Autor           
Kiwi-Minsker, Lioubov, Autor
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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Schlagwörter: XPS; UPS; carbon nanotubes revealing oxygen functional groups on carbon
 Zusammenfassung: A novel composite material consisting of carbon nanofibers (CNF) grown on sintered metal fibers (SMF) filters was modified by H2O2 or plasma-generated O3. Coupling TPD and XPS techniques in the same UHV apparatus allowed the direct correlation between the nature of the created O-functional groups and their evolution as CO and CO2 upon heating. The two oxidative treatments yielded different distributions of O-containing groups. The relative contribution of oxidized carbon was very low in the C1s region, so the functional groups were better analyzed in the O1s region. The quantification of the released oxygen by integration of the TPD CO, CO2 and H2O spectra, compared with the intensity loss of the XPS O1s spectra showed a good agreement. In order to fit the data adequately, the set of O1s spectra was decomposed in at least four peaks for the differently activated samples. Finally, it was shown that functional groups formed by H2O2-treatment (mostly non-phenolic OH groups) are thermally more stable than the ones formed by O3-treatment. The latter treatment increases the concentration of carboxylic functionalities, which decomposes at temperatures < 800 K; O3-activated CNF therefore should show a more pronounced acidic behavior.

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Sprache(n): eng - English
 Datum: 2010
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 435585
URI: http://dx.doi.org/10.1016/j.carbon.2010.01.029
 Art des Abschluß: -

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Titel: Carbon
Genre der Quelle: Zeitschrift
 Urheber:
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 48 (6) Artikelnummer: - Start- / Endseite: 1835 - 1843 Identifikator: -