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Iron-cobalt nanocrystalline alloy supported on a cubic mesostructured silica matrix: FeCo/SBA-16 porous nanocomposites.
- Source :
-
Journal of Nanoparticle Research . Aug2011, Vol. 13 Issue 8, p3489-3501. 13p. - Publication Year :
- 2011
-
Abstract
- 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, N physisorption, and transmission electron microscopy analyses show that after metal loading, calcination at 500 °C, and reduction in H 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13880764
- Volume :
- 13
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Journal of Nanoparticle Research
- Publication Type :
- Academic Journal
- Accession number :
- 62614152
- Full Text :
- https://doi.org/10.1007/s11051-011-0270-x