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Keywords:

  • carbon nanotubes;
  • dendrimers;
  • halides;
  • low-temperature synthesis;
  • supercritical carbon dioxide
Thumbnail image of graphical abstract

Multi-walled carbon nanotubes with controllable structures are produced at a low temperature (175 °C) by using CCl4 as the precursor for pyrolytic growth in a supercritical carbon dioxide medium, in the presence of iron catalysts encapsulated in polypropyleneimine dendrimers (see picture). This work may lead to a large-scale, cost-effective synthesis of carbon nanotubes for practical applications.