_tcm18-9556.gif )
High impact applications, properties and synthesis of exciting new materials
Also of interest
Physics, chemistry and biology of Soft Matter
Paper
J. Mater. Chem., 2003, 13, 1340 - 1344, DOI: 10.1039/b300484h
Preparation of highly pure double-walled carbon nanotubes
Jinquan Wei, Lijie Ci, Bin Jiang, Yanhui Li, Xianfeng Zhang, Hongwei Zhu, Cailu Xu and Dehai Wu
Double-walled carbon nanotubes (DWNTs) were prepared using floating chemical vapor deposition by adding a small amount of sulfur into the catalyst. The outer diameter of the DWNTs is from 1.5 to 3 nm. Raman study on DWNTs shows that the interlayer distance between the inner and outer tubes varies from 0.33 to 0.41 nm. The as-prepared DWNTs were purified by treatment with H2O2 and HCl to remove the amorphous carbon and catalyst particles from the sample. The carbon content increases from about 30 wt% to above 90 wt% after purification, the great majority of the sample is DWNTs (above 75 wt%).
RSS feed