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

• Autorzy: Seyedeh Mortazavi , Abdul Novinrooz , Ali Reyhani , Soghra Mirershadi
• Języki publikacji: EN

Abstrakty

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.

Słowa kluczowe

EN

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

• Czasopismo: Open Physics
• Rocznik: 2010
• Tom: 8
• Numer: 6
• Strony: 940-946

Daty

wydano

2010-12-01

online

2010-09-05

Twórcy

autor

Seyedeh Mortazavi

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

autor

Abdul Novinrooz

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

autor

Ali Reyhani

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

autor

Soghra Mirershadi

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

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Identyfikatory

DOI

10.2478/s11534-010-0017-9