One-step preparation of feco nanoparticles in a SBA-16 matrix as catalysts for carbon nanotubes growth

D. Carta, M. F. Casula, A. Corrias, A. Falqui, Á Dombovári, A. Gálos, Z. Kónya

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Nanocomposites containing FeCo alloy nanoparticles dispersed in a highly ordered 3D cubic Im3m mesoporous silica (SBA-16) matrix were prepared by a novel, single-step templated-assisted sol-gel technique. Two different approaches were used in the synthesis of nanocomposites; a pure SBA-16 sample was also prepared for comparison. Low-angle X-ray diffraction, transmission electron microscopy and N 2 physisorption at 77 K show that after metal loading, calcination at 500 °C and reduction in H 2 flux at 800 °C the nanocomposites retain the cubic mesoporous structure with pore size not very different from the pure matrix. X-ray absorption fine structure (EXAFS) analysis at Fe and Co K-edges demonstrates that the FeConanoparticles have the typical bcc structure. The final nanocomposites were tested as catalysts for the production of carbon nanotubes by catalytic chemical vapour deposition and high-resolution TEM shows that good quality multi-walled carbon nanotubes are obtained.

Original languageEnglish
Pages (from-to)6735-6746
Number of pages12
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number8
DOIs
Publication statusPublished - Aug 1 2011

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Keywords

  • Carbon nanotubes (CNTs)
  • Feco alloy
  • Mesoporous silica
  • Nanocomposites
  • Sol-Gel

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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