Controllable fabrication of carbon aerogels

Ya'ning Feng, Lei Miao, Sakae Tanemura, Masaki Tanemura, Kenzi Suzuki

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Nano-pore carbon aerogels were prepared by the sol-gel polymerization of resorcinol (1, 3-di-hydroxybenzene)(C6H4(OH)2) with formaldehyde (HCHO) in a slightly basic aqueous solution, followed by super-critical drying under liquid carbon dioxide as super-critical media and carbonization at 700°C under N2 gas atmosphere. The key of the work is to fabricate carbon aerogels with controllable nano-pore structure, which means extremely high surface area and sharp pore size distribution. Aiming to investigate the effects of preparation conditions on the gelation process, the bulk density, and the physical and chemical structure of the resultant carbon aerogels, the molar ratio of R/C (resorcinol to catalyst) and the amount of distilled water were varied, consequently two different sets of samples, with series of R/C ratio and RF/W (Resorcinol-Formaldehyde to water, or the content of reactant) ratio, were prepared. The result of N2 ad-sorption/desorption experiment at 77 K shows that the pore sizes decreasing from 11.4 down to 2.2 nm with the increasing of the molar ratio of R/C from 100 to 400, and/or, the pore sizes decreasing from 3.8 down to 1.6 nm with the increasing of reactant content from 0.4 to 0.6.

Original languageEnglish
Pages (from-to)284-288
Number of pages5
JournalRare Metals
Volume25
Issue number6 SUPPL. 1
DOIs
Publication statusPublished - 2006 Oct
Externally publishedYes

Keywords

  • Carbon aerogels
  • N adsorption/desorption
  • Resorcinol-formaldehyde aerogels
  • Super-critical drying

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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  • Cite this

    Feng, Y., Miao, L., Tanemura, S., Tanemura, M., & Suzuki, K. (2006). Controllable fabrication of carbon aerogels. Rare Metals, 25(6 SUPPL. 1), 284-288. https://doi.org/10.1016/S1001-0521(07)60090-4