Graphitization of highly porous carbons derived from poly(p-phenylene benzobisoxazole)

M. Beatriz Vázquez-Santos, Erik Geissler, Krisztina László, Jean Noël Rouzaud, Amelia Martínez-Alonso, Juan M.D. Tascón

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24 Citations (Scopus)

Abstract

We studied the development of graphitization in carbonaceous materials derived from poly(p-phenylene benzobisoxazole) (PBO) pre-activated with carbon dioxide to burn-off degrees of 15 and 51 wt.%. The activated materials were subsequently heat-treated at various temperatures comprised between 1600 and 2700 °C. The changes in porous texture, structure and nanostructure were characterized by gas adsorption analysis, X-ray diffraction, Raman spectroscopy and high-resolution transmission electron microscopy. The two sets of materials pre-activated to different degrees of burn-off exhibited similar changes as a function of the heat treatment temperature. Quite unexpectedly, the presence of porosity generated by physical activation of PBO chars does not affect their graphitizability. The materials seem to retain a sufficiently large degree of the order acquired during the spinning of the PBO fibres to allow the remaining bi-periodic structural units to re-arrange, allowing subsequent graphitization.

Original languageEnglish
Pages (from-to)2929-2940
Number of pages12
JournalCarbon
Volume50
Issue number8
DOIs
Publication statusPublished - Jul 1 2012

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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    Vázquez-Santos, M. B., Geissler, E., László, K., Rouzaud, J. N., Martínez-Alonso, A., & Tascón, J. M. D. (2012). Graphitization of highly porous carbons derived from poly(p-phenylene benzobisoxazole). Carbon, 50(8), 2929-2940. https://doi.org/10.1016/j.carbon.2012.02.062