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Synthesis of carbon nanotubes/alumina composites in supercritical media

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Abstract

Nanosized composites based on multiwall carbon nanotubes (CNTs) and Al2O3 have been obtained for the first time in supercritical (SC) media (water, hexane, and their mixture). For comparison, materials of the same net composition have been prepared by hydrothermal synthesis and sol–gel processing. The composites have been characterized by electron microscopy, X-ray diffraction, and thermal analysis. The structure of the materials synthesized in the SC media depends on the fluid composition. The most uniform composite containing alumina particles that are comparable in size to the CNT diameter and are stabilized on the carbon surface can be obtained in the SC mixture of hexane and water. When water and hexane are used separately, the formation of large alumina crystals on the CNT surface and contamination of the composite by the products of hexane pyrolysis and carbonization are, respectively, observed.

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Authors and Affiliations

  1. Faculty of Chemistry, Moscow State University, Moscow, 119991, Russia

    R. Yu. Novotortsev, S. A. Chernyak, S. V. Savilov & V. V. Lunin

Authors
  1. R. Yu. Novotortsev
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  2. S. A. Chernyak
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  3. S. V. Savilov
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  4. V. V. Lunin
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Correspondence to R. Yu. Novotortsev.

Additional information

Original Russian Text © R.Yu. Novotortsev, S.A. Chernyak, S.V. Savilov, V.V. Lunin, 2016, published in Sverkhkriticheskie Flyuidy. Teoriya i Praktika, 2016, Vol. 11, No. 1, pp. 16–24.

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Novotortsev, R.Y., Chernyak, S.A., Savilov, S.V. et al. Synthesis of carbon nanotubes/alumina composites in supercritical media. Russ. J. Phys. Chem. B 10, 1223–1228 (2016). https://doi.org/10.1134/S1990793116080157

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  • DOI: https://doi.org/10.1134/S1990793116080157

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