Table 1.

The FTIR analyses of the PbS, PANI, and PANI/PbS nano/microcomposites (I, II, and III).

Band position (cm−1)					Assignment
PANI/PbS composite I	PANI/PbS composite II	PANI/PbS composite III	PbS	PANI
3229	3226	3221	—	3401	N–H stretching vibrations of amino groups in the nano/microcomposite58
2925	2922	2920	—	2918	Vibration of C-H aromatic ring
1501	1500	1492	—	1530	The coordinated water molecule and C = C stretching vibrations of quinoid ring59
1289	1295	1295	1357	—	The frequencies of heteropolar diatomic molecules of lead sulfide60
1301	1301	1300	—	1301	C = C vibration of benzoid rings
1165	1155	1137	—	1138	C–N stretching vibrations
1041	1039	1040	1061	—	The frequencies of heteropolar diatomic molecules of lead sulide60
747	827	814	—	798	The aromatic C−H out-plane bending
596	592	590	—	587	Para disubstituted aromatic rings61