
Figure 1
XRD patterns of (a) Cu-HDS, (b) CT-1, and (c) CZT-3.

Figure 2
Chemical composition and the EDX spectrum of CZT-3.

Figure 3
TGA and DTA of (a) Cu-HDS and (b) CT-1.

Figure 4
TGA and DTA of CZT-3.

Figure 5
SEM images of CT-1: (a) at 10 micrometer, (b) at 1.0 micrometer and (c) at 100 nanometer.

Figure 6
SEM images of CZT-3: (a) at 10 micrometer and (b) at 100 nanometer.

Figure 7
Comparative (a) CV and (b) CD of the Cu-HDS, CT-1, and CZT-3 electrodes at different current densities.

Figure 8
Comparative specific capacitances of the Cu-HDS, CT-1, and CZT-3 electrodes at different current densities.

Figure 9
CV of the (a) Cu-HDS, (b) CT-1, and (c) CZT-3 electrodes at different scan rates.

Figure 10
GCD curves of the (a) Cu-HDS, (b) CT-1, and (c) CZT-3 electrodes at different current densities.

Figure 11
Cyclic stability graph of the CZT-3 electrode.