MWCNT sample | ICP-MSa residues (%) | Raman spectroscopy | EDXb | XPSc | Kaiser test | BETd | Pore volume | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Al | TEe | ID1/IG | ACf | C (%) | O(%) | N(%) | C(%) | O(%) | N(%) | (μmol/g) | (m2/g) | (μl/g) | |
NC7000 | 4.43 | 0.54 | 1.29 | 4.68 | 92.05 | 3.19 | 0 | 97.8 | 1.4 | 0 | – | 24 | 61 |
TP7000 | 0.04 | 0.16 | 0.47 | 0.48 | 98.89 | 1.06 | 0 | 99.4 | 0.6 | 0 | – | 30 | 83 |
TP-COOH | – | – | 0.41 | 0.81 | 98.59 | 1.22 | 0 | 95.1 | 4.4 | 0.5 | – | 141 | 381 |
TP-NH2 | – | – | 0.39 | 1.92 | 90.97 | 5.99 | 3.02 | 86.3 | 7.3 | 6.4 | 47 | 182 | 402 |
CP7000 | 0.13 | 0.15 | 1.28 | 4.07 | 98.88 | 0.98 | 0 | 98.1 | 1.9 | 0 | – | 30 | 111 |
CP-COOH | – | – | 1.16 | 5.00 | 95.47 | 4.33 | 0 | 94.1 | 5.9 | 0 | – | 179 | 521 |
CP-NH2 | – | – | 1.28 | 4.53 | 97.62 | 1.17 | 0.78 | 98.6 | 0.7 | 0.5 | 62 | 111 | 330 |