Table 2.
The apparent rate constants, electrical energy per order, and the apparent quantum yield for the photocatalytic degradation of 1.0 × 10–4 M dye pollutant upon UV irradiation.
| Catalyst | Concentration (g L−1) | Kapp (min−1) | EE/O (kWh/m3) | %Qapp |
|---|---|---|---|---|
| – | – | 1.0 × 10–4 | 50,000 | 7.6 × 10–5 |
| TiO2 | 0.5 | 5.9 × 10–3 | 714.2 | 0.47 |
| ZnO | 0.5 | 3.0 × 10–3 | 1666.6 | 0.24 |
| (TiO2–ZnO) (1:1) | 0.25 + 0.25 | 7.3 × 10–3 | 714.29 | 0.58 |
| Ag NPs | 0.02 | 8.3 × 10–3 | 625.0 | 0.64 |
| (TiO2–ZnO & x Ag NPs) | x = 0.02 | 1.1 × 10–2 | 384.6 | 0.87 |
| x = 0.06 | 3.1 × 10–2 | 166.7 | 2.62 | |
| x = 0.12 | 14.1 × 10–2 | 36.63 | 11.0 | |
| x = 0.18 | 26.0 × 10–2 | 20.00 | 20.2 |