Table 1.

FT-IR analysis of CuO, CdWO₄, and CuO–CdWO₄ samples.

CuO		CdWO4		CuO–CdWO4
Wavenumber Region (cm−1)	Assigned Group	Wavenumber (cm−1)	Assigned Group	Wavenumber Region (cm−1)	Assigned Group
3398	-O-H stretching	3419	-O-H stretching	3481–3400	-O-H stretching
2060	C=N stretching	2923 and 2853	Stretching vibration of C-H of CH3, and CH2, respectively	-	-
1590	C=O and/or -NH stretching	1744–1639	C=O, -NH, and aromatic C=C double-bond functional groups	1670–1590	C=O, -NH, and aromatic C=C double-bond functional groups
1400–1023	Aromatic C–C groups and C–O functional groups	1460–1020	Aromatic C–C groups and C–O functional groups	1460–1020	Aromatic C–C groups and C–O functional groups
935–700	Deformation vibration of C–H bonds	-	-	-	-
600–400	Cu–O bond	900–500	Intrinsic vibrations from CdWO4	1000–400	Vibrations from CuO and CdWO4