Table 4.
Atomic percentages of the chemical elements in the samples determined by XPS analysis.
| Sample | Atomic Percentage [%] | ||||
|---|---|---|---|---|---|
| C1s | O1s | S2p | N1s | Na1s | |
| fPES | 55.91 | 22.69 | 4.40 | 16.99 | |
| fPES-CN | 70.26 | 17.89 | 5.78 | 6.07 | 0.49 |
| fPES-CN-AB15C5 | 70.52 | 21.06 | 2.71 | 4.72 | - |
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