Improving the surface properties of multi-walled carbon nanotubes after irradiation with gamma rays

• DOI: 10.1016/j.apsusc.2011.08.085
• Publication Date: 2011-08-29T21:27:02Z
• Authors: B. Safibonab; A. Reyhani; A. Nozad Golikand; S.Z. Mortazavi; S. Mirershadi; M. Ghoranneviss
• Keywords: Carbon fibers

Abstract The effects of gamma-irradiation on the modification of the surface and structure of multi-walled carbon nanotubes were studied. Gamma-irradiation affected the graphitization properties of functional groups, and decreased the diameter of multi-walled carbon nanotubes. The irradiated multi-walled carbon nanotubes with the absorbed dose of 100 kGy exhibited a larger specific surface area and microporous volume as compared with the other samples. The Raman spectroscopy and X-ray photoelectron spectroscopy showed that the interaction between the gamma-irradiation and the multi-walled carbon nanotubes with the absorbed dose of 150 kGy destroyed the nanostructure of carbons, leading to the formation of diamond-like structures and carbon oxides. In addition, gamma-irradiation with the absorbed dose of 100 kGy improved multi-walled carbon nanotubes graphitization and surface properties while at higher absorbed dose (150 kGy), it induced damaged structures (sp 3 bonds and oxygen compositions).