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 Al^3+ and O^2− 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