In situ ultrasound-assisted ion exchange synthesis of sphere-like AgClxBr1-x composites with enhanced photocatalytic activity and stability
| Autor: | Kuerbangnisha Kadeer, Dilinuer Talifu, Yalkunjan Tursun, Abulikemu Abulizi, Hujiabudula Maimaitizi |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Ion exchange Band gap Health Toxicology and Mutagenesis Composite number General Medicine 010501 environmental sciences 01 natural sciences Pollution Halogen Photocatalysis Environmental Chemistry Degradation (geology) Charge carrier Composite material 0105 earth and related environmental sciences Visible spectrum |
| Zdroj: | Environmental Science and Pollution Research. 27:43615-43624 |
| ISSN: | 1614-7499 0944-1344 |
| DOI: | 10.1007/s11356-020-10218-z |
| Popis: | AgClxBr1-x composites with different halogen molar ratios (Cl/Br) were prepared by a facile ultrasound-assisted ion-exchange method. The formation of close contact between AgCl and AgBr facilitated the transportation of photoexcited charge carriers and contributed to the enhanced visible-light-driven photocatalytic degradation of different kinds of antibiotics. The AgClxBr1-x composites had a sphere-like morphology and tunable band gaps from 2.95 to 2.57 eV depending on Cl/Br mole ratios. Besides, the AgClxBr1-x composite was optimized by varying halogen mole ratios (Cl/Br) to achieve the highest photocatalytic activity. Results indicated that AgCl0.75Br0.25 showed the best photocatalytic degradation performance, which was about 2.36 and 2.78 times that of the single AgCl towards ciprofloxacin (CIP) and metronidazole (MNZ) degradation, respectively. Meanwhile, a possible photocatalytic degradation mechanism was discussed, and results indicated that the holes (h+) and •OH were the dominant active species in the AgCl0.75Br0.25 system. |
| Databáze: | OpenAIRE |
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