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BET surface areas obtained by adsorption of N2 at -196°C and amounts of CO2 and CO obtained by integration of areas under TPD spectra
| Sample | CNTs | CNTox | CNTox400 | CNTox900 |
|---|---|---|---|---|
| BET surface area (m2/g) | 254 | 400 | 432 | 449 |
| pHPZC | 7.3 | 4.2 | 6.9 | 7.4 |
| CO2 (μmol/g) | 70 | 778 | 230 | 24 |
| CO (μmol/g) | 193 | 1638 | 1512 | 204 |
| CO/CO2 | 2.76 | 2.11 | 6.57 | 8.50 |
