Visible-Light-Driven Photocatalytic Activity of Magnetic BiOBr/SrFe12O19 Nanosheets
| Autor: | Jiankang Wang, Jun Yang, Hu Jiao, Songli Liu, Taiping Xie, Longjun Xu, Chenglun Liu, Xiuyu Yin, Yuanzhen Lu, Yuan Peng |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Scanning electron microscope photocatalyst Rhodamine B General Chemical Engineering BiOBr/SrFe12O19 photodegradation rate Hydrothermal circulation Article lcsh:Chemistry chemistry.chemical_compound lcsh:QD1-999 chemistry Transmission electron microscopy Photocatalysis General Materials Science Irradiation Photodegradation magnetic photocatalyst Nuclear chemistry Visible spectrum |
| Zdroj: | Nanomaterials Volume 9 Issue 5 Nanomaterials, Vol 9, Iss 5, p 735 (2019) |
| ISSN: | 2079-4991 |
| Popis: | Magnetic BiOBr/SrFe12O19 nanosheets were successfully synthesized using the hydrothermal method. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and UV-visible diffused reflectance spectra (UV-DRS), and the magnetic properties were tested using a vibration sample magnetometer (VSM). The as-produced composite with an irregular flaky-shaped aggregate possesses a good anti-demagnetization ability (Hc = 861.04 G) and a high photocatalytic efficiency. Under visible light (&lambda > 420 nm) and UV light-emitting diode (LED) irradiation, the photodegradation rates of Rhodamine B (RhB) using BiOBr/SrFe12O19 (5 wt %) (BOB/SFO-5) after 30 min of reaction were 97% and 98%, respectively, which were higher than that using BiOBr (87%). The degradation rate of RhB using the recovered BiOBr/5 wt % SrFe12O19 (marked as BOB/SFO-5) was still more than 85% in the fifth cycle, indicating the high stability of the composite catalyst. Meanwhile, after five cycles, the magnetic properties were still as stable as before. The radical-capture experiments proved that superoxide radicals and holes were main active species in the photocatalytic degradation of RhB. |
| Databáze: | OpenAIRE |
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