Carbon-nanotube growth over iron nanoparticles formed on CaCO3 support by using hydrogen reduction

Nguyen Duc Dung, Nguyen Van Chuc, Ngo Thi Thanh Tam, Nguyen Hong Quang, Phan Hong Khoi, Phan Ngoc Minh

Research output: Contribution to journalJournal Article peer-review

16 Scopus citations


Carbon nanotubes (CNTs) were grown by chemical vapor deposition on a mixture of iron salt and CaCO3. Salt mixtures of Fe(NO 3)3·9H2O/CaCO3 and FeCl 3·6H2O/CaCO3 with various Fe weight contents were used as catalysts for growing the CNTs. A scanning electron microscope study revealed that the CNTs were densely grown on the Fe(NO 3)3·9H2O/CaCO3 catalyst containing 5 wt.% Fe. The effect of growth temperature on the segregation of Fe nanoparticles formed by hydrogen reduction is discussed. The result shows that 800 °C is the optimal temperature for the formation of Fe nanoparticles over which CNTs grow with the highest yield of 78.61 %. A raman spectroscope and a scanning transmission electron microscope were utilized to characterize the multiwall structure of the CNTs. The 92.16 % purity of the CNTs was determined by using thermal gravimetric analysis.

Original languageEnglish
Pages (from-to)1372-1377
Number of pages6
JournalJournal of the Korean Physical Society
Issue number5
StatePublished - 05 2008
Externally publishedYes


  • CaCO
  • CNTs
  • CVD
  • FeCl


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