Roles of Metal−Support Interaction in Growth of Single- and Double-Walled Carbon Nanotubes Studied with Diameter-Controlled Iron Particles Supported on MgO

2004 ◽  
Vol 108 (49) ◽  
pp. 18908-18915 ◽  
Author(s):  
Hiroki Ago ◽  
Kazuhiro Nakamura ◽  
Naoyasu Uehara ◽  
Masaharu Tsuji
Keyword(s):  
Carbon Nanotubes ◽  
Iron Particles ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

scholarly journals Synthesis of multi-walled carbon nanotubes with controlled inner and outer diameters by ethylene decomposition over Ni/MgO and Co/MgO catalysts

2018 ◽  
Vol 36 (4) ◽  
pp. 739-747 ◽  
Author(s):  
N.V. Lemesh ◽  
P.E. Strizhak
Keyword(s):  
Carbon Nanotubes ◽  
Growth Mechanism ◽  
Supported Catalysts ◽  
Support Interaction ◽  
Ethylene Decomposition ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Multi Walled Carbon Nanotubes ◽  
Co Nanoparticles ◽  
Walled Carbon Nanotubes

AbstractIn this work, multi-walled carbon nanotubes (MWCNTs) with significantly different mean diameters were produced by catalytic CVD over Ni and Co-based supported catalysts. Our results indicate that Ni nanoparticles in the Ni/MgO catalyst are responsible for controlling the inner diameters of the carbon nanotubes. Contrary, Co nanoparticles in the Co/MgO catalyst control the outer diameters of MWCNTs. The “base-growth” mechanism and smaller diameters of the MWCNTs grown on the Ni/MgO catalyst are associated with a strong metal-support interaction (SMSI) resulting from NixMg1−xO mixed oxide formation. The concept of the weak metal-support interaction (WMSI) between Co nanoparticles and MgO for the Co/MgO catalyst confirms the “tip-growth” mechanism of the MWCNTs.

Effect of time on the metal-support (Fe-MgO) interaction in CVD synthesis of single-walled carbon nanotubes

2010 ◽  
Vol 64 (2) ◽  
Author(s):  
Anna Steplewska ◽  
Ewa Borowiak-Palen ◽  
Ryszard Kalenczuk
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Diameter Distribution ◽  
Process Time ◽  
Single Walled Carbon ◽  
Metal Support Interaction ◽  
Cvd Synthesis ◽  
Metal Support ◽  
Walled Carbon Nanotubes ◽  
Relative Purity

AbstractA study on the effect of the metal-support interaction by employing iron particles supported on magnesium oxide (MgO) nanopowder in an alcohol-CVD process for single-walled carbon nanotubes growth is presented. Upon the prolongation of the process time, three main observations were detected: (i) decrease of the mean nanotubes diameter, (ii) reduction of the diameter distribution by the factor of two, (iii) increase of relative purity of the samples.

Sign in / Sign up

Export Citation Format

Share Document