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Citation: CUI Shen, WANG Lei, QIAO Ya-Li, CUI Lan. Purification of Multi-wall Carbon Nanotubes by Calcining Method[J]. Chinese Journal of Applied Chemistry, ;2000, 17(4): 417-419. shu

Purification of Multi-wall Carbon Nanotubes by Calcining Method

CUI Shen ^a ,
WANG Lei ^a ,
QIAO Ya-Li ^b ,
CUI Lan ^b

a.
a. Department of Chemistry, Tianjin University, Tianjin 300072;
b.
b. Analytical Center, Tianjin University, Tianjin

Received Date: 15 December 1999
Available Online: 10 April 2000
Fund Project: 国家自然科学基金(59682008) (59682008)天津市重点自然科学基金(983801511)资助项目 (983801511)

The Multi-wall Carbon Nanotubes (MWNTs) were prepared by catalytic deco-mposition of methane at 600℃. The raw products of MWNTs were heated for different time in the air at 500℃. The qualitative and semi-quantitative phase analyses of the samples were performed by XRD measurements. The morphology of the samples were observed by transmission electron microscope and their specific surface areas were measured. After the MWNTs were heated for 4 hours, their walls became clean and thinner, i.e., the inner diameters became larger and the outer ones became smaller. And their dispersing extent was improved. But calcining method could not eliminate the metals and their oxides existing in the samples.
- multi-walls carbon nanotube,
- calcining method,
- purification
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