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

Carta, Daniela, Casula, MF, Corrias, A, Falqui, A, Dombovári, Á, Gálos, A and Kónya, Z (2011) One-step preparation of FeCo nanoparticles in a SBA-16 matrix as catalysts for carbon nanotubes growth Journal of Nanoscience and Nanotechnology,, 11 (8). pp. 6735-6746.

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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 N2 physisorption at 77 K show that after metal loading, calcination at 500 °C and reduction in H2 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 FeCo nanoparticles 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.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemistry
Authors :
Casula, MF
Corrias, A
Falqui, A
Dombovári, Á
Gálos, A
Kónya, Z
Date : 1 August 2011
Identification Number : 10.1166/jnn.2011.4230
Depositing User : Jane Hindle
Date Deposited : 31 Aug 2017 13:15
Last Modified : 31 Aug 2017 13:15

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