Table 1.
The quantitative fitting results of C1s XPS for the CDs.
| Sample | C 1s | |||
|---|---|---|---|---|
| C–C/C=C (%) | C–N (%) | C–O (%) | COOH (%) | |
| b-CDs | 84.38 | 12.25 | 3.37 | - |
| g-CDs | 49.33 | 17.67 | 26.66 | 7.34 |
| y-CDs | 75.67 | 18.30 | 6.03 | - |
| r-CDs | 43.24 | 11.43 | 34.96 | 10.37 |
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