Photocatalytic degradation effect of the CQDs/ZnO composites using different carbon sources.
| Carbon source of CQDs | Light source | Pollutant | Pollutant concentration (mg L−1) | Photocatalyst dosage (g L−1) | Irradiation times (min) | Degradation rate (%) | Reference |
|---|---|---|---|---|---|---|---|
| Glucose | Halogen lamp (500 W) | Methylene blue | 10 | 0.1 | 30 | 96 | 3 |
| Sucrose | Halogen lamp with a filter (500 W, wavelength > 420 nm) | Rhodamine B | 10 | 0.1 | 60 | 98 | 19 |
| d-Fructose | Xenon lamp (wavelength > 420 nm) | Rhodamine B | 2.3 | 1.5 × 10−4 | 105 | 94 | 20 |
| l-Ascorbic acid | Osram lamp (400 W) | Methylene blue | 50 | 1 | 120 | 87 | 21 |
| l-Ascorbic acid | Blended mercury lamp (250 W) | Methylene blue | 30 | 1 | 120 | 100 | 22 |
| Sodium citrate | Xenon lamp (300 W) | Methylene blue | 10 | 0.1 | 60 | 98 | 23 |
| Coffee grounds | UVB lamp (6 W, wavelength: 360 nm) | Methylene blue | 5 | 0.25 | 150 | 80 | 15 |
| Peach juice | UV lamp | Methylene blue | 20 | 2 | 60 | 95 | 25 |
| Graphite rods | Xenon lamp (18 mW cm−2) | Tetracycline | 10 | 0.5 | 30 | 100 | 24 |
| WRN | Purple light lamp (20 W, wavelength: 405 nm) | Methylene blue | 20 | 2 | 10 | 98.88 | This work |
| Tetracycline | 20 | 2 | 10 | 98.21 | |||
| Malachite green | 20 | 2 | 10 | 98.66 | |||
| Methyl violet | 20 | 2 | 10 | 98.11 | |||
| Basic fuchsin | 20 | 2 | 40 | 99.39 | |||
| Rhodamine B | 20 | 2 | 80 | 99.33 | |||
| Aniline | 20 | 2 | 80 | 99.90 |