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1 results

  • Nanoscale carbon blacks produced by CO2 laser pyrolysis

  • Xiang-Xin Bi, M. Jagtoyen, M. Endo, K. Das Chowdhury, R. Ochoa, F.J. Derbyshire, M.S. Dresselhaus, P.C. Eklund
  • Journal:
    Journal of Materials Research / Volume 10 / Issue 11 / November 1995
    Published online by Cambridge University Press:
    03 March 2011, pp. 2875-2884
    Print publication:
    November 1995
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  • CO2 laser pyrolysis has been used to synthesize carbon black (particle diameter ∼30 nm) via a catalytically driven pyrolysis of benzene vapor. The H : C ratio is found to be ∼1 : 10, which is unusually high for carbon blacks. Subsequent heat treatment of the “laser black” to temperatures up to ∼2800 °C produces well-graphitized faceted particles with central polygonal cavities. High resolution TEM lattice imaging, Raman scattering, and x-ray diffraction have been used to characterize the morphological structure of these carbon particles in their as-synthesized and heat-treated forms. Furthermore, KOH treatment at ∼800 °C has been employed to activate the as-synthesized particles, producing a tenfold increase in the surface area from 50 to 700 m2/g. Possible pore structures generated during this activation process have been identified by high resolution TEM imaging.