Comparison of the hydrogen-evolution activities of various as-prepared catalystsa.
| S. no. | Photocatalysts | Au at the support (wt%) | Reaction time (6 h) | H2 evolution | |
|---|---|---|---|---|---|
| mmol g−1 | mmol g−1 h−1 | ||||
| 1 | Zn3V2O8 | 0.0 | 10:00 am to 16:00 pm | 4.69 | 0.78 |
| 2 | Au0.2@Zn3V2O8 | 0.2 | 10:00 am to 16:00 pm | 8.61 | 1.43 |
| 3 | Au0.4@Zn3V2O8 | 0.4 | 10:00 am to 16:00 pm | 17.52 | 2.95 |
| 4 | Au0.6@Zn3V2O8 | 0.6 | 10:00 am to 16:00 pm | 27.09 | 4.51 |
| 5 | Au0.8@Zn3V2O8 | 0.8 | 10:00 am to 16:00 pm | 36.36 | 6.06 |
| 6 | Au1.0@Zn3V2O8 | 1.0 | 10:00 am to 16:00 pm | 42.31 | 7.05 |
a
Amount of catalysts = 5 mg, sacrificial reagent = 5% ethanol, photon flux = sunlight/ca. 6.5 mW cm−2.