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

Carta, D. and Casula, M.F. and Bullita, S. and 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 (8). pp. 3489-3501. ISSN 1388-0764. (doi:https://doi.org/10.1007/s11051-011-0270-x) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1007/s11051-011-0270-x

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 structure-directing 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 well-ordered 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
Uncontrolled keywords: Metallic alloys, Nanosized FeCo alloy, SBA-16 mesoporous silica, Self-assembly, Sol-gel, Triblock copolymers, Cage-like structures, Catalytic nanoparticle, Cubic symmetry, Fe-Co alloy, FeCo nanoparticles, High surface area, High thermal stability, Iron-cobalt, Low-angle X ray diffraction, matrix, Mesoporous Silica, Mesostructured silica, Metal loadings, Metallic alloys, Nano-sized, Narrow size distributions, Nonionic, Pluronic-127, SBA-16 mesoporous silica, Spherical shape, Structure directing agents, Thick-wall, Transmission electron, Well-ordered structure, Wet impregnation method, Block copolymers, Calcination, Cobalt, Copolymerization, Metallic matrix composites, Nanocomposites, Nanoparticles, Physisorption, Silica, Surface structure, Transmission electron microscopy, X ray diffraction, X ray diffraction analysis, Nanocrystalline alloys, alloy, cubic mesostructured silica matrix, iron cobalt nanocrystalline alloy, nanocomposite, nanoparticle, poloxamer, silicon dioxide, unclassified drug, article, chemical procedures, chemical structure, ion transport, nanocatalysis, nitrogen physisorption, priority journal, synthesis, temperature, thermostability, transmission electron microscopy, wet impregnation, X ray diffraction
Subjects: Q Science > QC Physics > QC176.8.N35 Nanoscience, nanotechnology
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Anna Corrias
Date Deposited: 16 Dec 2014 14:39 UTC
Last Modified: 04 Dec 2017 12:25 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46169 (The current URI for this page, for reference purposes)
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