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
Dündar Tekkaya, Ezgi and Karatepe, Nilgün (2015) 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. (Accepted/In Press)
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Official URL: http://dx.doi.org/10.1080/1536383X.2015.1010641
The synthesis of multi wall carbon nanotubes (MWCNTs) was studied using catalytic chemical vapor deposition of acetylene at 500°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.
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