Table 4.
Comparative spectroscopic properties of ZnO NPs/CPE with other literature reports.
| UV-Vis (nm) | ζ (mV) | Eg (eV) |
FTIR Peak cm−1 |
Technique | Reference | |
|---|---|---|---|---|---|---|
| ZnO NPs/GPE | 366 | −42.9 | 3.26 | 553 | Green | This work |
| ZnO NPs/LPE | 360 | −38.8 | 3.20 | 553 | Green | This work |
| ZnO NPs/OPE | 359 | −34.2 | 3.30 | 553 | Green | This work |
| ZnO NPs | - | - | - | 450–540 | Green | [13] |
| - | - | - | 540–417 | Chemical | ||
| ZnO NPs | 215 | - | Green | [1] | ||
| ZnO NPs | 274 | −51.8 | ~417 | Green | [2] | |
| ZnO NPs | - | - | 668.29 | Green | [5] | |
| ZnO NPs thin film | 363 | - | -- | 470 | Sol-gel | [8] |
| ZnO NPs | 360 | - | - | 520 | Sol-gel | [12] |
| Zinc nano rod | ~370 | - | 3.37 | - | Sol-gel | [36] |