Abstract
An x-ray small-angle scattering study is reported of the structure of nanoporous carbon prepared by chlorinating carbide compounds having different crystal structures (SiC, TiC, Mo2C). The measurements were carried out both in reflection and transmission. The angular dependences of the scattering intensity obtained are treated as a result of scattering from nanoparticles of different size. By unfolding the experimental curves into components corresponding to particles with different gyration radii R g, scatterer distribution functions in gyration radius m(R g) were found. It is shown that, irrespective of the type of the starting carbide, particles with R g∼5 Å make up the largest fraction in porous carbon. Samples prepared from different carbides differ in the degree of nanoparticle uniformity in size. The most uniform in size are nanoparticles in the samples prepared from SiC, in which the average value R avg <6 Å. Nanoparticles in the porous carbon produced from Mo2C are about twice larger.
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Fiz. Tverd. Tela (St. Petersburg) 41, 1484–1488 (August 1999)
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Kyutt, R.N., Smorgonskaya, É.A., Danishevskii, A.M. et al. Structural study of nanoporous carbon produced from polycrystalline carbide materials: Small-angle x-ray scattering. Phys. Solid State 41, 1359–1363 (1999). https://doi.org/10.1134/1.1130998
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DOI: https://doi.org/10.1134/1.1130998