Enhanced electrochemical performance of MoS2/PPy nanocomposite as electrodes material for supercapacitor applications

Electrical Conductivity Based Ammonia Sensing Properties of Polypyrrole/MoS2 Nanocomposite

“…The peak present at 922 cm −1 corresponds to the C=N + −C stretching vibration. This peak at 922 cm −1 confirms the doping of PPy by FeCl 3 and creation of charge carriers, i.e., polarons [ 6 , 7 , 9 , 12 , 31 ].…”

“…In the spectrum of MoS 2 ( Figure 1 b), the peaks witnessed at 998, 839 and 568 cm −1 are in good agreement with the existing literature. These peaks at 998 and 568 cm –1 may be assigned to the S–S and Mo–S bonds of MoS 2 , respectively [ 5 , 22 , 23 , 31 ].…”

“…The peaks observed at 1546, 1460, 1306, 1186, 1042, 922 and 788 cm −1 in the spectrum of pristine PPy are observed at slightly higher wavenumbers in the case of PPy/MoS 2 at 1563, 1466, 1319, 1210, 1047, 932 and 791 cm −1 , respectively. The shifting of characteristic peaks of PPy in the spectrum of PPy/MoS 2 shows the electronic/synergistic interaction working at molecular levels [ 31 , 33 ].…”

“…In the spectrum of PPy ( Figure 2 a), the broad diffraction peak seen at 2θ = 21–27° shows the amorphous nature of PPy [ 9 , 12 , 31 , 32 ]. In the case of MoS 2 ( Figure 2 b), the peaks located at 2θ = 32.65°, 33.61°, 35.90°, 39.55°, 44.20°, 49.86°, 56.15°, 58.50° and 60.35° are assigned to (100), (101), (102), (103), (006), (105), (106), (110), (008) and (108) diffraction planes, respectively [ 20 , 24 , 31 ]. Whereas in the spectrum PPy/MoS 2 ( Figure 2 c), the distinctive peaks of MoS 2 are detected at slightly higher angles, i.e., 2θ = 32.78°, 33.72°, 35.99°, 39.70°, 44.30°, 49.92°, 56.26°, 58.59° and 60.65° respectively, displaying molecular interaction between PPy and MoS 2 .…”

“…Niaz et al [ 31 ] successfully prepared a MoS 2 /PPy nanocomposite by the in-situ oxidative polymerization method. They evaluated its electrochemical properties for possible application in supercapacitors as electrode materials.…”