Preparation and characterization of cerium oxide templated from activated carbon

Mark Crocker, Uschi M. Graham, Rolando Gonzalez, Gary Jacobs, Erin Morris, Aurora M. Rubel, Rodney Andrews

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

The application of carbon templating to the preparation of cerium oxide and cerium-zirconium mixed oxide was investigated. Impregnation of a highly mesoporous activated carbon (Darco KB-B) with aqueous cerium nitrate, followed by calcination to remove the template, afforded nanocrystalline ceria with a surface area of up to 148m2/g. Ceria-zirconia with surface area of 148 m2/g was similarly prepared. TEM studies on the ceria product revealed the presence of a polycrystalline phase, comprised of irregular aggregates of ceria crystallites of ca. 6.5 Qnm diameter. Use of activated carbon fibers (ACFs) as templates afforded ceria with a gross morphology resembling that of the fiber template. The lower surface areas (3-59 m 2/g) of the resulting ceria reflect the mainly microporous nature of the ACFs; evidently the Ce nitrate solution is largely unable to penetrate the micropores. TEM showed the ceria fibers to be comprised of crystallites possessing a morphology similar to the Darco KB-B templated ceria.

Original languageEnglish
Pages (from-to)3454-3464
Number of pages11
JournalJournal of Materials Science
Volume42
Issue number10
DOIs
StatePublished - May 2007

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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