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Characterization of cobalt phosphide nanoparticles derived from molecular clusters in mesoporous silica
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Characterization of cobalt phosphide nanoparticles derived from molecular clusters in mesoporous silica
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Journal Article
Characterization of cobalt phosphide nanoparticles derived from molecular clusters in mesoporous silica
2013
Overview
The synthesis of well dispersed cobalt phosphide nanoparticles (NPs) in SBA-15 mesoporous silica by wet impregnation of the molecular cluster [Co
4
(CO)
10
(μ-dppa)] (
1
) (dppa = HN(PPh
2
)
2
) is described. The thermal activation of the silica impregnated precursor under a H
2
/N
2
(5/95 %) stream at different temperatures to form NPs was studied and it was found that the size of the latter is limited in the 5.5–6.5 nm range by the size of the pores. The obtained materials were characterized by various analytical methods. The porosity and the structure of the mesoporous silica supports were analyzed by N
2
adsorption/desorption and small-angle X-ray diffraction. The nanoparticles were characterized by wide-angle X-ray diffraction, transmission electron microscopy in conventional and scanning modes, electron tomography, energy-dispersive X-ray spectroscopy, and magnetic measurements. Cobalt phosphide NPs of few nanometers were observed in the pores of SBA-15.
Publisher
Springer Netherlands,Springer,Springer Nature B.V,Springer Verlag
Subject
Characterization and Evaluation of Materials
/ Chemistry and Materials Science
/ Cobalt
/ Condensed matter: structure, mechanical and thermal properties
/ Cross-disciplinary physics: materials science; rheology
/ Exact sciences and technology
/ Lasers
/ Nanoscale materials and structures: fabrication and characterization
/ Optics
/ Physics
/ Pores
/ Porosity
/ Silica
/ Solid surfaces and solid-solid interfaces
/ Structure of solids and liquids; crystallography
/ Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)
/ X-ray diffraction and scattering
