Table 4.
Bond types (functional groups) and wavenumber of GO materials.
| Peak | Wavenumber (GO-based Coconut Shell Waste) (cm−1) | Bond types (Functional groups) | Wavenumber (GO-based commercial graphite) (cm−1) | Bond types (Functional groups) |
|---|---|---|---|---|
| 1 | 3449.92 | -OH (Hydroxyl) stretching | 3427 | -OH (Hydroxyl) stretching |
| 2 | 1719.42 | -COOH (Carboxyl) stretching | 1730 | -COOH (Carboxyl) stretching |
| 3 | 1702.62 | -COOH (Carboxyl) stretching | 1630 | C–OH (Alcohol) stretching |
| 4 | 1628.12 | C–OH (Alcohol) stretching | 1371 | C–OH (Alcohol) stretching |
| 5 | 1158.51 | C–O (Epoxy) stretching | 1054 | C–O (Epoxy) stretching |