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Iron-cobalt nanocrystalline alloy supported on a cubic mesostructured silica matrix: FeCo/SBA-16 porous nanocomposites

Carta, Daniela, Casula, F, Bullita, S, Falqui, A and Corrias, A (2011) Iron-cobalt nanocrystalline alloy supported on a cubic mesostructured silica matrix: FeCo/SBA-16 porous nanocomposites Journal of Nanoparticle Research, 13. pp. 3489-3501.

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Abstract

A series of novel nanocomposites constituted of FeCo nanoparticles dispersed in an ordered cubic Im3m mesoporous silica matrix (SBA-16) have been successfully synthesized using the wet impregnation method. SBA-16, prepared using the non-ionic Pluronic 127 triblock copolymer as a structuredirecting agent, is an excellent support for catalytic nanoparticles because of its peculiar three-dimensional cage-like structure, high surface area, thick walls, and high thermal stability. Low-angle X-ray diffraction, N2 physisorption, and transmission electron microscopy analyses show that after metal loading, calcination at 500 C, and reduction in H2 flux at 800 C, the nanocomposites retain the wellordered structure of the matrix with cubic symmetry of pores. FeCo alloy nanoparticles with spherical shape and narrow size distribution (4–8 nm) are homogeneoulsy distributed throughout the matrix and they seem in a large extent to be allocated inside the pores.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemistry
Authors :
NameEmailORCID
Carta, Danielad.carta@surrey.ac.ukUNSPECIFIED
Casula, FUNSPECIFIEDUNSPECIFIED
Bullita, SUNSPECIFIEDUNSPECIFIED
Falqui, AUNSPECIFIEDUNSPECIFIED
Corrias, AUNSPECIFIEDUNSPECIFIED
Date : 12 February 2011
Uncontrolled Keywords : SBA-16 mesoporous silica; Sol–gel; Nanosized FeCo alloy; Self-assembly; Triblock copolymers; Metallic alloys
Depositing User : Jane Hindle
Date Deposited : 31 Aug 2017 13:35
Last Modified : 31 Aug 2017 13:35
URI: http://epubs.surrey.ac.uk/id/eprint/842107

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