Enhanced visible-light-driven photocatalytic activity of BiFeO3 via electric-field control of spontaneous polarization
| Autor: | Dezeng Li, Hong Yun, Jianwu Cao, Guoquan Huang, Ganghua Zhang, Tao Zeng, Zhipeng Gao |
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| Rok vydání: | 2019 |
| Předmět: |
Photoluminescence
Materials science business.industry Mechanical Engineering Poling Metals and Alloys Nanoparticle 02 engineering and technology Photoelectric effect 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity 0104 chemical sciences Mechanics of Materials Materials Chemistry Photocatalysis Optoelectronics 0210 nano-technology Polarization (electrochemistry) business Visible spectrum |
| Zdroj: | Journal of Alloys and Compounds. 783:943-951 |
| ISSN: | 0925-8388 |
| Popis: | Well-polarized BiFeO3 nanoparticles have been successfully prepared by a facile electrical poling method with the assist of a soluble organic-inorganic composite film. From XRD, TEM and SEM studies, no significant change in the crystal structure or morphology was detected after the electrical poling process. The visible-light driven photocatalytic process of poled BiFeO3 nanoparticles was accelerated by 2 times compared to unpoled BiFeO3. By combining time-resolved photoluminescence (PL), photoinduced silver deposition testing and photoelectrochemical measurements, it can be revealed that the enhanced photocatalytic performance of poled samples can be properly attributed to the promoted separation and prolonged lifetime of the photogenerated carriers caused by the ferroelectric polarization. These findings may offer a new route to promote the photocatalytic or photoelectric performances of BiFeO3 for advanced applications by adjusting the ferroelectric polarization. |
| Databáze: | OpenAIRE |
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