%0 Journal Article
%A P. González-García , E. Urones-Garrote, E. del Corro , D. Ávila-Brande , L.C. Otero-Díaz
%T The production of carbon particles of different shapes produced by the chlorination of Cr(C5H5)2
%D 2013
%U https://hdl.handle.net/20.500.14352/136728
%X Carbon particles have been obtained by the chlorination of chromocene (Cr(C5H5)2). Changes in their morphology and micro-nanostructure have been monitored at two different temperatures. At 400  C, filled materials (tubes and spheres) and agglomerated round particles are formed, whereas at 900  C closed-end tubes, hollow and solid spheres were produced. Transmission electron microscopy shows that these particles are formed of highly disordered graphene-like layers, which is confirmed by the absence of the 2D and 2G bands in the Raman spectrum. The calculated in-plane correlation length of these graphene-like layers is 1.2 ± 0.1 nm. In all the carbon particles, electron energy-loss spectroscopy shows a very similar sp2 carbon bonding content (89–98%) and mass density ranging from 1.6 to 1.8 g/cm3, both below standard graphite. Textural studies performed on the sample prepared at 900  C show Type II adsorption isotherms with a surface area of 694m2/g.
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