Table 2 Results of XPS measurements of pristine and functionalized MWCNT
Sample | C 1s [%] | N 1s [%] | O 1s [%] | S 2s [%] | Functionalization degree [nmol/mgCNT] |
|---|---|---|---|---|---|
p-MWCNT | 98.2 | 0.0 | 1.8 | 0.0 | – |
MWCNT-OH | 89.5 | 3.2 | 7.3 | 0.0 | 4.4 |
MWCNT-COOH | 86.1 | 0.4 | 12.4 | 0.0 | 4.9 |
MWCNT-NH2 | 87.4 | 4.1 | 8.5 | 0.0 | 1.5 |
MWCNT-SH | 89.4 | 2.3 | 7.0 | 1.3 | 1.0 |