Cu-doped resorcinol-formaldehyde (RF) polymer and carbon aerogels

Orsolya Czakkel, Erik Geissler, Imre M. Szilágyi, Edit Székely, K. László

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Introduction of transition metal salt(s) onto the surface of porous carbons may increase the selectivity and/or efficiency of these adsorbents in catalysis or separation. Carbon aerogels with low pressure drop are particularly suited for these applications. Moreover the sol-gel process used in the synthesis of the resorcinol-formaldehyde polymer gel (RF) precursors offers an extra opportunity for introducing metal ions. Salts of different metals modify both the macroscopic texture and the porosity, depending on the synthesis protocol. In this paper we show, by means of low temperature nitrogen adsorption measurements and SEM, as well as small- and wide-angle X-ray scattering (SAXS and WAXS), how the addition of copper acetate at three different stages influences not only the specific surface area but also the resulting overall structure over a wide range of length scales. Posttreatment in either the polymer or the carbon aerogel stage provides a means of adjusting the copper content. While the Cu-containing carbon aerogels differ mainly in their micropore volume but not in the width of the distribution, their pore size window in the mesopore range can be tuned between 50 and 400 Å by the protocol of Cu addition. The synthesis protocol also determines the chemical form of the copper.

Original languageEnglish
Pages (from-to)513-522
Number of pages10
JournalJournal of Colloid and Interface Science
Volume337
Issue number2
DOIs
Publication statusPublished - Sep 15 2009

Fingerprint

Aerogels
Formaldehyde
Polymers
Carbon
Copper
Salts
Catalyst selectivity
X ray scattering
Specific surface area
Adsorbents
Sol-gel process
Catalysis
Pore size
Pressure drop
Transition metals
Metal ions
Acetates
Nitrogen
Gels
Textures

Keywords

  • Carbon aerogel
  • Copper
  • Doping
  • Gas adsorption
  • RF aerogel
  • SAXS/WAXS

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Colloid and Surface Chemistry

Cite this

Cu-doped resorcinol-formaldehyde (RF) polymer and carbon aerogels. / Czakkel, Orsolya; Geissler, Erik; Szilágyi, Imre M.; Székely, Edit; László, K.

In: Journal of Colloid and Interface Science, Vol. 337, No. 2, 15.09.2009, p. 513-522.

Research output: Contribution to journalArticle

Czakkel, Orsolya ; Geissler, Erik ; Szilágyi, Imre M. ; Székely, Edit ; László, K. / Cu-doped resorcinol-formaldehyde (RF) polymer and carbon aerogels. In: Journal of Colloid and Interface Science. 2009 ; Vol. 337, No. 2. pp. 513-522.
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