Effects of acid treatment duration and sulfuric acid molarity on purification of multi-walled carbon nanotubes

• Authors: Seyedeh Mortazavi , Abdul Novinrooz , Ali Reyhani , Soghra Mirershadi
• Languages of publication: EN

Abstracts

EN

Multi-walled carbon nanotubes were synthesized using a Fe-Ni bimetallic catalyst supported by MgO using thermal chemical vapor deposition. Purification processes to remove unwanted carbon structures and other metallic impurities were carried out by boiling in sulfuric acid solution. Various analytical techniques such as TGA/DSC, Raman spectroscopy, SEM, HRTEM and EDAX were employed to investigate the morphology, graphitization and quality of the carbon nanotubes. The obtained results reveal the molarity of sulfuric acid and immersed time of the carbon nanotubes in the acid solution is very effective at purifying multi-walled carbon nanotubes. It was also found that 5 M concentration of boiling sulfuric acid for a 3 h treatment duration led to the highest removal of the impurities with the least destructive effect. Moreover, it was observed that acid treatment results in decreasing of CNTs’ diameter.

Keywords

EN

multi-walled carbon nanotubes; thermal chemical vapor deposition; purification; sulfuric acid

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2010
• Volume: 8
• Issue: 6
• Pages: 940-946

Dates

published

1 - 12 - 2010

online

5 - 9 - 2010

Contributors

author

Seyedeh Mortazavi

• Materials Research School (NSTI), P.O. Box 31485-498, Karaj, Iran

author

Abdul Novinrooz

• Materials Research School (NSTI), P.O. Box 31485-498, Karaj, Iran

author

Ali Reyhani

• Materials Research School (NSTI), P.O. Box 31485-498, Karaj, Iran

author

Soghra Mirershadi

• Materials Research School (NSTI), P.O. Box 31485-498, Karaj, Iran

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Identifiers

DOI

10.2478/s11534-010-0017-9