Log Number: 32
Abstract Submitted to the NT-99-Logo NANOTUBE-99 Workshop:

Semi-continuous Synthesis, Alignment and Hydrogen Storage of SWNTs by Hydrogen Plasma Arc

H. M. Cheng1, C. Liu1, H. T. Cong2, M. S. Dresselhaus3

1 Institute of Metal Research, CAS, Shenyang 110015, China
2 State Key Lab. of RSA, Institute of Metal Research, CAS, Shenyang 110015, China
3 Massachusetts Institute of Technology, Cambridge, MA 02139
Contact e-mail: cheng@imr.ac.cn

Single-walled carbon nanotubes (SWNTs) were synthesized by a semi-continuous plasma electric arc method. A novel reactor was designed with a big rotating graphite cylinder (400mm in diameter) as an anode on whose upper surface many holes were drilled for holding the mixture of graphite powders and catalysts. Hydrogen and argon gases were used as the buffer gas instead of the expensive He gas, and a sulfur-containing growth promoter was introduced. Since the position of the two electrodes are both adjustable, a semi-continuous SWNT synthesis can be realized, and gram quantities of SWNTs per hour can be achieved. The addition of a sulfur-containing growth promoter and the introduction of hydrogen gas were found to be critical to the SWNT growth. Three types of products, thin films, web-like substance and macroscopically long ropes of aligned SWNT bundles, were obtained. Based on HRTEM observations and Raman scattering results, our SWNTs have a larger mean diameter (1.85 nm) than the SWNTs grown by other methods. Hydrogen uptake experiments show that our SWNTs have a great potential for hydrogen-storage applications.

* Supported by NSFC No. 59872045 and High-Tech Program of MOST, China.

This document at the URL https://nanoten.com/conf-org/NT99/abstracts/32.html has received 00256 hits since August 3, 2020.
Last modification:   2020.07.24 (Friday) 20:31:07 EDT