3.1.1.4. Fourier transformation infrared spectroscopy (FTIR)
The measurement showed low-intensity broad band centered at 3533 cm-1, which usually appears in nanomaterials due to water adsorption on their surfaces. This band is due to the stretching vibration of hydroxyl in water which is proven by the presence of the bending stretching band of hydroxyl in water at 1620 cm-1 [16].
The band at 1448 cm-1 indicates the presence of the C=C bond, which is present after the combustion of organic compounds and the transformation into an skeletal carbonic structure only [17]. The distinctive bands of cadmium oxide appeared in the spectrum as follows: a band at 1049 cm-1 and a band at 540 cm- 1 and a band at 1311 cm-1, which are attributed to the stretching vibration of Cd-O [18-20]. See Figure 5.
Figure 5: FTIR of the CdO nanoparticles