A better understanding of CNTs chemical purification and functionalization processes

Purification and functionalization of carbon nanotubes have been examined using different acid treatments. CNTs treatment may vary depending on the desired outcome. The results show that HCl as a strong acid, oxidizes all the materials present in the sample. HNO
₃
acts as an oxidizing agent which is useful to produce functional CNTs. H
₂
O
₂
behaves as a regulator in presence of both acids. The results suggest that H
₂
O
₂
may be a critical element to control the outcome of CNTs purification and functionalization process.