Author/Authors :
Ci، نويسنده , , Lijie and Rao، نويسنده , , Zhilong and Zhou، نويسنده , , Zhenping and Tang، نويسنده , , Dongsheng and Yan، نويسنده , , Xiaoqin and Liang، نويسنده , , Yingxin and Liu، نويسنده , , Dongfang and Yuan، نويسنده , , Huajun and Zhou، نويسنده , , Weiya and Wang، نويسنده , , Gang and Liu، نويسنده , , Wei and Xie، نويسنده , , Sishen، نويسنده ,
Abstract :
Double wall carbon nanotubes (DWCNTs) were mass-produced by pyrolizing C2H2 at the temperature range of 900–1100 °C on a floating iron catalyst with sulfur promoted. Our experiments indicated that the growth of DWCNTs was strongly dependent on the sulfur addition, and without sulfur only single wall carbon nanotubes (SWCNTs) were produced. The outer tube diameters of DWCNTs observed by high resolution electron microscopy (HRTEM) vary from 1.05 to 2.89 nm, and the inner tube diameters vary from 0.40 to 2.19 nm. The effect mechanism of sulfur to the growth of DWCNTs was discussed.
