Growth of single and double walled carbon nanotubes over Co/V/MgO catalysts
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Zhejiang 317000 (China)
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Renmin Road, Chengdu, Sichuan 610041 (China)
Highlights: {yields} Co/V/MgO has remarkable catalytic activity on the growth of SWCNTs and DWCNTs. {yields} The diameter of CNTs can be controlled by adjusting molar ratio of Co-V to MgO. {yields} The formation of C{sub 7}V{sub 8} is critical to the synthesis of thin CNTs. -- Abstract: High quality single walled carbon nanotubes (SWCNTs) and double walled carbon nanotubes (DWCNTs) were synthesized on Co/V/MgO catalysts by catalytic decomposition of CH{sub 4} in H{sub 2}. Raman spectroscopy data revealed that the diameters of as-prepared SWCNTs are 1.28 and 0.73 nm. The diameter value of DWCNTs from Raman analysis also showed a narrow diameter distribution. Using field emission transmission electron microscopy (TEM), it was found that the diameter of carbon nanotubes can be controlled mainly by adjusting the molar ratio of Co-V versus the MgO support. The structure properties of catalysts were examined by X-ray diffraction (XRD). The formation of C{sub 7}V{sub 8} may play an important role in preserving carbon in the catalyst particle and favoring the dissociation balance of CH{sub 4}.
- OSTI ID:
- 22210119
- Journal Information:
- Materials Research Bulletin, Vol. 46, Issue 11; Other Information: Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
Similar Records
High Efficiency Cascade Solar Cells
Probing the role of CNTs in Pt nanoparticle/CNT/graphene nanohybrids H 2 sensors