Acta Phys. -Chim. Sin. ›› 2004, Vol. 20 ›› Issue (10): 1233-1238.doi: 10.3866/PKU.WHXB20041013

• ARTICLE • Previous Articles     Next Articles

Ni-Mo Bi-Metallic Oxide Catalyst for Large-scale Synthesis of Bundled Multi-walled Carbon Nanotubes by CVD

Li Yu;Zhang Xiao-Bin;Tao Xin-Yong;Wang You-Wen;Liu Fu;Xu Guo-Liang   

  1. Institute of Material Physics and Microstructures; State Key Laboratory of Silicon Materials; Analysis and Measurement Center, Zhejiang University, Hangzhou 310027
  • Received:2004-02-24 Revised:2004-06-07 Published:2004-10-15
  • Contact: Zhang Xiao-Bin

Abstract: Ni-Mo bi-metallic oxide catalyst prepared by a sol-gel method has been used to synthesize high quality multi-walled carbon nanotube bundles with high purity by catalytic decomposition of CH4. The experiment reveals that the prepared catalysts have high activity and high efficiency. After reaction for 2 h, the quantity of synthesized MWNTs is over 80 times of the pristine catalysts. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), thermal gravimetric analysis (TGA), powder X-ray diffraction (XRD) and laser Raman spectroscopy have been performed to characterize the synthesized MWNT bundles. The results show that the synthesized MWNT bundles have a diameter distribution about 10~20 nm. The longer the reaction time is, the graphitization degree of the synthesized MWNT bundles is. After reaction for 1 h, the MWNT bundles with a high purity of more than 97%can be obtained. With a simple enlarged process, a single furnace can produce over 40 g MWNTs for 1 g of catalyst in 30 min.

Key words: Multi-walled carbon nanotubes bundles, Sol-gel method, Chemical vapor deposition