Table 4 FTIR band assignment of virgin CMC and CMC filled with 2 and 4 wt% of CuO@ZnO core/shell NPs.
Wavenumber (cm−1) | Band assignment | ||
|---|---|---|---|
CMC | CS-1 | CS-2 | |
3261 | 3292 | 3226 | Stretching of OH group |
2919 | 2922 | 2919 | CH stretching of the CH2 groups |
- | - | 2892 | CH asymmetric stretching |
1585 | 1587 | 1585 | Carboxylate group (COO−) asymmetric stretching |
1412 | 1413 | 1411 | CH2 scissoring |
1322 | 1321 | 1321 | OH bending |
1052 | 1051 | 1051 | The C–O–C bending vibration |
1019 | 1020 | 1018 | C–O bond of the CH2 OH group |
912 | 912 | 912 | C–O stretching + CH2 rocking motion |
– | 538 | 570 | O–Cu–O |
– | 516 | 518 | O–Cu–O |
– | 433 | 474 | O–Zn–O |
– | 420 | 420 | O–Zn–O |
