Table 2. Peak Area Ratios of Different O Species in PAC before and after Activation.
| sample | O atom % | O species
ratio, % |
–OH atom % | –C=O atom % | C–O atom % | –COOH atom % | |||
|---|---|---|---|---|---|---|---|---|---|
| –OH | –C=O | C–O | –COOH | ||||||
| PAC-750-0.5h | 9.60 | 41.06 | 25.24 | 15.12 | 18.58 | 3.94 | 2.42 | 1.45 | 1.78 |
| PAC-0.2K2CO3-750-0.5 | 23.33 | 31.15 | 29.90 | 21.94 | 17.00 | 7.27 | 6.98 | 5.12 | 3.97 |
| PAC-0.5K2CO3-750-0.5 | 24.62 | 28.35 | 29.31 | 23.71 | 18.63 | 6.98 | 7.22 | 5.84 | 4.59 |
| PAC-1.5K2CO3-750-0.5 | 14.61 | 28.61 | 29.28 | 23.43 | 18.68 | 4.18 | 4.28 | 3.42 | 2.73 |
| PAC-0.2KOH-750-0.5 | 24.06 | 31.54 | 30.24 | 22.32 | 15.90 | 7.59 | 7.28 | 5.37 | 3.83 |
| PAC-0.5KOH-750-0.5 | 21.33 | 25.22 | 30.90 | 25.70 | 18.18 | 5.38 | 6.59 | 5.48 | 3.88 |