1. Crystal Size and Band Gap Size of the Prepared Photocatalysts.
| sample name | crystallite size D (nm) | band gap energy (eV) |
|---|---|---|
| ZnO | 40.2 | 3.13 |
| Ag2O–ZnO | 30.8 | 2.95 |
| 3% CuO/Ag2O–ZnO | 32.7 | 2.93 |
| 5% CuO/Ag2O–ZnO | 32.5 | 2.60 |
| 10% CuO/Ag2O–ZnO | 34.9 | 2.35 |
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