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| Sample | C C | C–C | C–O/C–O–C | C O | O–C O | π–π* |
|---|---|---|---|---|---|---|
| GO | 284.50 | 285.20 | 287.24 | 288.60 | — | |
| rGO-140 | 284.50 | 285.20 | 286.22 | 288.33 | 289.57 | 290.98 |
| rGO-h | 284.50 | 285.20 | 286.10 | 287.65 | 288.83 | 290.99 |
GO represents GO-100, GO-325 and GO-2000. rGO-140 represents rGO-100, rGO-325 and rGO-2000. rGO-h represents GO-100 was expanded at 300, 500, 700, 900 and 1000 °C (rGO-300, rGO-500, rGO-700, rGO-900, rGO-1000).
