Abstract
Graphite phase carbon nitride (g-C3N4) was synthesized by calcination of melamine, carbon quantum dots (CQDs) were prepared from citric acid and carbamide. Then the CQDs/g-C3N4 composite photocatalytic materials were prepared by hydrothermal method. The morphology and structure of these materials were characterized by FESEM, FETEM, XRD, XPS and UV-VIS. Then, the performance and mechanism of tetracycline hydrochloride degradation by CQDs/g-C3N4 in visible light were studied. The results showed that CQDs loading enhanced the visible light absorption and photocatalytic activity of the materials. Furthermore, the degradation rate of the tetracycline hydrochloride in aqueous solution by CQDs/g-C3N4 reached 99% after 110 min visible light irradiation at CQDs/g-C3N4 dosage of 0.3 g and pH=7. In addition, CQDs/g-C3N4 composite material had good stability and recycling ability. The photocatalytic reaction of CQDs/g-C3N4 composite material was dominated by ·OH and H+, and the introduction of CQDs helped the migration and separation of the carriers, thereby improving the efficiency of the photocatalytic degradation of tetracycline hydrochloride.
| Translated title of the contribution | Synthesis of CQDs/g-C3N4 for visible light photocatalytic degradation of tetracycline |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 1199-1207 |
| Number of pages | 9 |
| Journal | Chinese Journal of Environmental Engineering |
| Volume | 16 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 26 Apr 2022 |
| Externally published | Yes |