Research Article
Characterization of Modified and Polymer Coated Alumina Surfaces by Infrared Spectroscopy
Table 2
DRIFT bands that are characterizing parent and thermally treated alumina samples.
| Bands cm−1 | Assignment | Absorbance | Al | AlC500 | AlC1000 |
| 3504 |
The wide band corresponds to the hydroxyl groups adsorbed on the surface (for free Al2O3) | — | 0.4 | 0.24 | 3334
| 0.55
| —
| —
| 1633 | Band corresponds to the bending of the H–O–H bonds | 0.31 | 0.25 | 0.15 | 1157 | | 0.47 | 0.37 | 0.2 | 1058 | Cluster of Al3+ and O2− ions on the surface of alumina | 0.56 | 0.37 | — | 877 | Al–O overtone | 0.54 | 0.51 | — | 754 | — | — | 0.51 | 671 | 0.65 | 0.56 | 0.52 |
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