Table 1.
Characteristic wavenumbers expressed in (cm−1) associated to assignments of FTIR absorption bands of PV polymer, PVN and TiO2 nanostructures.
| Peaks | PV Polymer | PVN | TiO2 NPs | TDN | Assignment |
|---|---|---|---|---|---|
| a | 3384(a1) | 3380(a1) | 3442(a2) | 3443(a2) | O–H stretching |
| b | 2942 | 2941 | - | - | –CH2– stretching |
| c | 2910 | 2913 | - | - | –CH2– symmetrical and asymmetrical stretching |
| d | 1715 | 1714 | - | - | C=O, C–O band from carbonyl group |
| e | - | - | 1637 | 1639 | bending modes of water Ti–OH |
| f | 1435 | 1434 | - | - | CH2, O–H and C–H bending |
| g | 1377 | 1377 | - | - | CH2 wagging |
| h | 1333 | 1330 | - | - | O–H in-plane bending with C–H wagging |
| i | 1143 | - | - | - | C–C stretching, O–H bending, C–O–C, C–O |
| j | 1094 | 1094 | CO stretching, OCC antisymmetric stretching | ||
| k | 919 | 920 | - | - | CH2 bending |
| l | 851 | 849 | - | - | CH2 rocking |
| m | - | - | 700–400 | 800–400 | Ti–O–Ti bonding |