Comparative study of nanopores in activated carbons by HRTEM and adsorption methods

Vladimir M. Gun'Ko, Oleksandr P. Kozynchenko, Stephen R. Tennison, Roman Leboda, Jadwiga Skubiszewska-Ziȩba, Sergey V. Mikhalovsky

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Detailed analysis of nanopores (IUPAC micropores at pore half-width x < 1 nm) of carbonised porous phenolformaldehyde resin microbeads used as a precursor of activated carbon (AC) and CO 2 activated carbon (at 50% burn-off) has been performed on the basis of high-resolution transmission electron microscopy (HRTEM) image analysis and nitrogen adsorption data analysed using several density functional theory (DFT) methods. The results of quenched solid DFT (QSDFT) and nonlocal (NLDFT) are in agreement with the pore size distributions of nanopores based on the HRTEM image analysis. Development of porosity with progressive activation degree in a series of ACs leads to enhancement of the deviation of the pore shape from the used pore models. The TG/DTA data and Raman spectra show nonlinear but weak changes in the AC characteristics with increasing burn-off degree.

Original languageEnglish
Pages (from-to)3146-3153
Number of pages8
JournalCarbon
Volume50
Issue number9
DOIs
Publication statusPublished - Aug 1 2012

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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