TY - GEN
T1 - The role of H2 reduction in the growth of single-walled carbon nanotubes
AU - Yuca, Neslihan
AU - Gümüş, Fatih
AU - Karatepe, Nilgün
PY - 2013
Y1 - 2013
N2 - Carbon nanotubes (CNTs) with their high mechanical, electrical, thermal and chemical properties are regarded as promising materials for many different potential applications. Chemical vapor deposition (CVD) is a common method for CNT synthesis especially for mass production. There are important parameters (synthesis temperature, catalyst and calcination conditions, substrate, carbon source, synthesis time, H2 reduction, etc.) affecting the structure, morphology and the amount of the CNT synthesis. In this study, CNTs were synthesized by CVD of acetylene (C2H2) on magnesium oxide (MgO) powder substrate impregnated by iron nitrate (Fe (NO3) 3·9H2O) solution. The synthesis conditions were as follows: at catalyst calcination temperatures of 400 and 550°C, calcination time of 0, 15, 30 and 45 min, hydrogen concentrations of 0, 50 and 100 % vol, synthesis temperature of 800°C and synthesis time of 30 minutes. The synthesized materials were characterized by thermal gravimetric analysis (TGA), transmission electron microscopy (TEM), X ray diffraction (XRD) and Raman spectroscopy. Effects of H2 reduction on catalyst calcination and CNT synthesis were investigated.
AB - Carbon nanotubes (CNTs) with their high mechanical, electrical, thermal and chemical properties are regarded as promising materials for many different potential applications. Chemical vapor deposition (CVD) is a common method for CNT synthesis especially for mass production. There are important parameters (synthesis temperature, catalyst and calcination conditions, substrate, carbon source, synthesis time, H2 reduction, etc.) affecting the structure, morphology and the amount of the CNT synthesis. In this study, CNTs were synthesized by CVD of acetylene (C2H2) on magnesium oxide (MgO) powder substrate impregnated by iron nitrate (Fe (NO3) 3·9H2O) solution. The synthesis conditions were as follows: at catalyst calcination temperatures of 400 and 550°C, calcination time of 0, 15, 30 and 45 min, hydrogen concentrations of 0, 50 and 100 % vol, synthesis temperature of 800°C and synthesis time of 30 minutes. The synthesized materials were characterized by thermal gravimetric analysis (TGA), transmission electron microscopy (TEM), X ray diffraction (XRD) and Raman spectroscopy. Effects of H2 reduction on catalyst calcination and CNT synthesis were investigated.
KW - CVD
KW - H
KW - carbon nanotubes
KW - fluidized bed
KW - reduction
UR - http://www.scopus.com/inward/record.url?scp=84896878024&partnerID=8YFLogxK
U2 - 10.1117/12.2023994
DO - 10.1117/12.2023994
M3 - Conference contribution
AN - SCOPUS:84896878024
SN - 9780819496645
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Carbon Nanotubes, Graphene, and Associated Devices VI
T2 - Carbon Nanotubes, Graphene, and Associated Devices VI
Y2 - 28 August 2013 through 29 August 2013
ER -