Characterization of Modified and Polymer Coated Alumina Surfaces by Infrared Spectroscopy

Table 4

DRIFT bands that are characterizing hydrothermally treated alumina samples.

Bands cm^−1	Assignment	Absorbance
		AlHT	AlCHT
3309	Hydroxyl groups adsorbed on the surface (for free Al2O3)	0.87	0.75
3114		0.83	0.73
1557	Bending of the H–O–H bonds	0.33	0.28
1060	Cluster of Al^3+ and O^2− ions on the surface of alumina	0.97	0.81
739	Al–O stretching	0.98	0.84
664		1	0.85