Investigation of the Effect of Reaction Time, Weight Ratio, and Type of Catalyst on the Yield of Multi-Wall Carbon Nanotubes via Chemical Vapor Deposition of Acetylene


Dundar-Tekkaya E. , KARATEPE N.

FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES, cilt.23, ss.853-859, 2015 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 23 Konu: 10
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1080/1536383x.2015.1010641
  • Dergi Adı: FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
  • Sayfa Sayıları: ss.853-859

Özet

The synthesis of multi-wall carbon nanotubes (MWCNTs) was studied using catalytic chemical vapor deposition of acetylene at 500 degrees C for 30 and 60 min. Catalysts were prepared by impregnating Fe, Co, Ni, V, and bimetallic mixture of Fe-Co on MgO with a weight ratio of 1: 100, 5: 100, and 10: 100. The effects of the reaction time, the type, and the weight ratio of the catalysts on the carbon yield of MWCNTs were investigated. Experimental results showed that the 10: 100 weight ratio of Fe-Co: MgO had the highest carbon yield (81.97%) and the MWCNT to amorphous carbon ratio (100.6), whereas 10: 100 V: MgO had the lowest carbon yield (8.44%). Statistical analyses indicated that increasing weight ratio enhanced the carbon efficiencies of Fe, Co, Fe-Co, and Ni catalyst; moreover, increasing the reaction time had a positive effect on the carbon efficiencies of Fe and V catalysts.