Facile fabrication of well-polarized Bi2WO6 nanosheets with enhanced visible-light photocatalytic activity
| Autor: | Tao Zeng, Guoquan Huang, Ganghua Zhang, Jian Li, Jianwu Cao, Dezeng Li, Weifeng Yao |
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| Rok vydání: | 2018 |
| Předmět: |
Fabrication
Materials science Photoluminescence Poling Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity Catalysis 0104 chemical sciences Piezoresponse force microscopy Photocatalysis 0210 nano-technology Polarization (electrochemistry) |
| Zdroj: | Catalysis Science & Technology. 8:6420-6428 |
| ISSN: | 2044-4761 2044-4753 |
| Popis: | A universal and facile strategy is proposed to fabricate polarized Bi2WO6 nanoparticles with the assistance of a soluble organic–inorganic composite film. After electric poling, there is no significant change in the crystal structure or morphology as confirmed by XRD, SEM and TEM studies. By combining piezoresponse force microscopy (PFM), photoinduced silver deposition and time-resolved photoluminescence (PL) testing, it can be revealed that the promoted separation and prolonged lifetime of photogenerated carriers are unambiguously caused by ferroelectric polarization. The visible-light-driven photocatalytic activity of the polarized Bi2WO6 nanosheets was significantly improved by 2-fold compared to that of pristine Bi2WO6. This electric poling strategy offers a new route for large-scale fabrication of various polarized ferroelectric nanoparticles, and has immense potential for practical applications in catalysis, optoelectronics and energy storage devices. |
| Databáze: | OpenAIRE |
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