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Structural properties of some transition metal highly doped carbon aerogels

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Cotet L.Cosmin , Baia Monica, Baia Lucian, Popescu I.Catalin, Cosoveanu Veronica, Indrea Emil, Popp J, Danciu Virginia

Editorial: ELSEVIER, Journal of Alloys and Compounds, 434–435, p.854-857, 2006.

Rezumat:

Structural characterization of transition metal highly doped carbon aerogels obtained through the sol–gel polymerization process of the formaldehyde with the potassium salt of 2,4-dihydroxybenzoic acid, followed by metal ions exchange using Ni(II) and Cu(II) aqueous solutions, supercritical drying with liquid CO2 and carbonization at 1050 °C under inert atmosphere has been performed. Transmission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy were used and it was found that the metal-containing phase is more homogeneously distributed in Cu-doped carbon aerogels. The presence of the metal species determines both the growth of graphitic nanoribbons and the change of framework of the interconnected carbon particles.

Cuvinte cheie: metal highly doped carbon aerogels , supercritical drying , Transmission electron microscopy (TEM), X-ray diffraction (XRD ) , Raman spectroscopy