کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1315647 | 976054 | 2007 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A comparative study on properties of multi-walled carbon nanotubes (MWCNTs) modified with acids and oxyfluorination A comparative study on properties of multi-walled carbon nanotubes (MWCNTs) modified with acids and oxyfluorination](/preview/png/1315647.png)
In this study, the surface modification of multi-walled carbon nanotubes (MWCNTs) with acid and oxyfluorination has been examined. Acid treatment of multi-walled CNTs produces many functionalized groups on the surface of MWCNTs, such as C–N stretching and the asymmetric carboxylate group (–COO–). It can be concluded that nitrogen doping of the graphite sheets may take place and a C–N bond identical to the sp3-bonded carbon nitride may form during the acid treatment process. In addition, oxyfluorinated MWCNTs exhibit higher BET specific surface area and mesopore volume than those of the as-received and acid treated MWCNTs. Therefore, acid and oxyfluorination treatments are more effective methods for enhancing the chemical and textural properties of MWCNTs.
The shape and relative intensity of Raman spectra were changed due to acid treatment and oxyfluorination. Raman spectra of (a) as-received; (b) acid treated; (c) oxyfluorinated MWCNTs. Figure optionsDownload as PowerPoint slide
Journal: Journal of Fluorine Chemistry - Volume 128, Issue 1, January 2007, Pages 60–64