Relative contents (%) of oxygen-containing functional groups obtained from C1s spectra curve fitting.
Sample | Graphitized carbon (284.6 eV) | Hydroxyl groups (286.0 eV) | Carbonyl groups (287.3 eV) | Carboxyl groups (288.9 eV) |
---|---|---|---|---|
Non-treated | 79.66 | 11.01 | 6.99 | 2.35 |
HNO3 treated | 69.95 | 15.29 | 7.73 | 7.03 |