Insight into the mechanism for photocatalytic degradation of ciprofloxacin with CeO2
| Autor: | Shengtao Xing, Yuanzhe Gao, Jing Liu, Tongyan Li |
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| Rok vydání: | 2019 |
| Předmět: |
Pollutant
Chemistry 02 engineering and technology 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention 010309 optics Electron transfer Adsorption law 0103 physical sciences Photocatalysis Degradation (geology) Irradiation Diffuse reflection Electrical and Electronic Engineering 0210 nano-technology Electron paramagnetic resonance |
| Zdroj: | Optik. 183:266-272 |
| ISSN: | 0030-4026 |
| DOI: | 10.1016/j.ijleo.2019.02.122 |
| Popis: | CeO2 was found to be an efficient photocatalyst for the degradation of ciprofloxacin (CIP) under simulated solar light irradiation. The solution pH significantly affected the degradation efficiency and the optimized pH was in the range of 6–9. The scavenger experiment indicates that the photogenerated hole were the main active species for CIP degradation. The interaction between CIP and CeO2 was investigated by ultraviolet-visible diffuse reflectance, electron paramagnetic resonance and X-ray photoelectron spectra. The results demonstrate the electron transfer from the adsorbed CIP to CeO2. The activated CIP can be readily degraded by the holes. This suggests that the interaction between pollutants and photocatalyst plays an important role in pollutants removal. Finally, the intermediates were identified and a possible pathway for CIP degradation was proposed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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