Fabrication of nanostructured clay-carbon nanotube hybrid nanofiller by chemical vapour deposition

Dhanagopal Manikandan, Ramalinga Viswanathan Mangalaraja, Rajendran Siddheswaran, Ricardo E. Avila, Solaiappan Ananthakumar

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


Growth of multiwalled carbon nanotube (CNT) assemblies by chemical vapour decomposition (CVD) technique was achieved through decomposition of acetylene using iron impregnated montmorillonite (MM) catalysts. Various amounts of iron loaded montmorillonite catalysts were prepared by wet impregnation method and calcined at 450°C. The catalysts were subjected to X-ray diffraction (XRD) and surface area analyses. Acetylene decomposition at a feed ratio of N 2 :H 2 :C 2 H 2 = 1:1:0.18 was conducted in the presence of iron impregnated montmorillonite catalysts in the CVD reactor for the growth of CNT structures. The role of Fe-activated clay catalyst on the formation of CNT structures has been systematically examined at various temperatures and correlated with the morphological features of CNTs. Catalyst assisted acetylene decomposition results the formation of different carbon nanostructures such as nanotubes, nanofibres and nanoflakes. These clay-CNT products were characterised for their morphological, thermal, qualitative and quantitative analyses. The morphological variations of CNT assemblies reveal Fe-montmorillonite catalysts have high selectivity at given reaction conditions. Thermogravimetric and Raman spectral analyses prove that the CNTs contain a good crystallanity and less structural defects.

Original languageEnglish
Pages (from-to)4460-4466
Number of pages7
JournalApplied Surface Science
Issue number10
StatePublished - 1 Mar 2012
Externally publishedYes


  • Carbon nanotubes
  • Catalysts
  • Chemical vapour deposition (CVD)
  • Montmorillonite
  • Nanofiller


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