Table 4. Oxygen-Containing Carbon Surface Functional Groups.
| support | carboxylic (μmol g–1) | lactonic (μmol g–1) | phenolica (μmol g–1) |
|---|---|---|---|
| GNP | 4 ± 21 | 449 ± 65 | 93 ± 66 |
| KBB | 150 ± 24 | 372 ± 56 | 321 ± 78 |
Phenolic groups and hydroxyl functions with similar pKa are detected.