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Table 3
XPS C1s components peak position and relative percentage (%), for all the samples, obtained from each deconvolution procedure. Assignation to each chemical shift has been done according to [25].
| C1s components (%) | ||||||
|---|---|---|---|---|---|---|
| 400 °C | 400 °C + O2 | 600 °C | 600 °C + O2 | 800 °C | 800 °C + O2 | |
| C–(C/H) (284.5 eV) | 66.6 | 46.8 | 77.0 | 58.3 | 72.7 | 61.8 |
| C–O–(C/H) (285.5–286.2 eV) | 21.7 | 18.0 | 9.6 | 10.5 | 7.4 | 2.0 |
| C═O (286.5–287.4 eV) | 5.5 | 15.8 | 5.2 | 18.0 | 8.3 | 21.4 |
| C–O–§C═O (288.0–288.7 eV) | 3.2 | 12.0 | 3.6 | 3.5 | 5.0 | 10.8 |
| H–O–§C═O (288.8–289.0 eV) | – | 7.4 | – | 9.7 | – | 4.0 |
| π−π* (>290 eV) | 3.0 | – | 4.6 | – | 6.6 | – |
| C—O bonds (%) | 30.4 | 53.2 | 18.4 | 41.7 | 20.7 | 38.2 |
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