Quantum-sized BiVO4 modified TiO2 microflower composite heterostructures: Efficient production of hydroxyl radicals towards visible light-driven degradation of gaseous toluene
© The Royal Society of Chemistry 2015. In an effort to develop visible-light-driven heterostructured photocatalysts with high activity, a novel quantum-sized tubelike BiVO4 sensitized TiO2 microflower catalytic system was successfully fabricated by using a facile hydrothermal and ultrasonic adhering...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/44537 |
| _version_ | 1848757030004719616 |
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| author | Sun, J. Li, Xin Yong Zhao, Q. Tadé, Moses Liu, Shaomin |
| author_facet | Sun, J. Li, Xin Yong Zhao, Q. Tadé, Moses Liu, Shaomin |
| author_sort | Sun, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © The Royal Society of Chemistry 2015. In an effort to develop visible-light-driven heterostructured photocatalysts with high activity, a novel quantum-sized tubelike BiVO4 sensitized TiO2 microflower catalytic system was successfully fabricated by using a facile hydrothermal and ultrasonic adhering approach. The structural and optical properties of the as-prepared samples were comparatively characterized. The staggered band structure of quantum-sized BiVO4 decorated TiO2 not only extended the photo-response range but also promoted photoexcited charges transfer and separation. Photocatalytic activities of the as-prepared samples were examined by the degradation of toluene under visible light irradiation (? > 400 nm). Compared to the individual TiO2 microflower, BiVO4 quantum tube, BiVO4 nanoparticle and nano-BiVO4/TiO2, the quantum-BiVO4/TiO2 (Q-BiVO4/TiO2) composite exhibited higher photo activities. Electron spin resonance (ESR) examinations confirmed the generation of the photo-induced reactive oxygen species (OH and O2 -) which were involved in the photocatalytic process of Q-BiVO4/TiO2 composites. Furthermore, the enhanced photocatalytic activity of the Q-BiVO4/TiO2 composite mainly originated from the high separation efficiency of photo-induced electron-hole pairs and the efficient production of hydroxyl radicals. A detailed mechanism accounting for the superior photocatalytic activity was proposed in terms of the energy band structures of the components. |
| first_indexed | 2025-11-14T09:21:36Z |
| format | Journal Article |
| id | curtin-20.500.11937-44537 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:21:36Z |
| publishDate | 2015 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-445372017-09-13T14:14:26Z Quantum-sized BiVO4 modified TiO2 microflower composite heterostructures: Efficient production of hydroxyl radicals towards visible light-driven degradation of gaseous toluene Sun, J. Li, Xin Yong Zhao, Q. Tadé, Moses Liu, Shaomin © The Royal Society of Chemistry 2015. In an effort to develop visible-light-driven heterostructured photocatalysts with high activity, a novel quantum-sized tubelike BiVO4 sensitized TiO2 microflower catalytic system was successfully fabricated by using a facile hydrothermal and ultrasonic adhering approach. The structural and optical properties of the as-prepared samples were comparatively characterized. The staggered band structure of quantum-sized BiVO4 decorated TiO2 not only extended the photo-response range but also promoted photoexcited charges transfer and separation. Photocatalytic activities of the as-prepared samples were examined by the degradation of toluene under visible light irradiation (? > 400 nm). Compared to the individual TiO2 microflower, BiVO4 quantum tube, BiVO4 nanoparticle and nano-BiVO4/TiO2, the quantum-BiVO4/TiO2 (Q-BiVO4/TiO2) composite exhibited higher photo activities. Electron spin resonance (ESR) examinations confirmed the generation of the photo-induced reactive oxygen species (OH and O2 -) which were involved in the photocatalytic process of Q-BiVO4/TiO2 composites. Furthermore, the enhanced photocatalytic activity of the Q-BiVO4/TiO2 composite mainly originated from the high separation efficiency of photo-induced electron-hole pairs and the efficient production of hydroxyl radicals. A detailed mechanism accounting for the superior photocatalytic activity was proposed in terms of the energy band structures of the components. 2015 Journal Article http://hdl.handle.net/20.500.11937/44537 10.1039/c5ta05659d restricted |
| spellingShingle | Sun, J. Li, Xin Yong Zhao, Q. Tadé, Moses Liu, Shaomin Quantum-sized BiVO4 modified TiO2 microflower composite heterostructures: Efficient production of hydroxyl radicals towards visible light-driven degradation of gaseous toluene |
| title | Quantum-sized BiVO4 modified TiO2 microflower composite heterostructures: Efficient production of hydroxyl radicals towards visible light-driven degradation of gaseous toluene |
| title_full | Quantum-sized BiVO4 modified TiO2 microflower composite heterostructures: Efficient production of hydroxyl radicals towards visible light-driven degradation of gaseous toluene |
| title_fullStr | Quantum-sized BiVO4 modified TiO2 microflower composite heterostructures: Efficient production of hydroxyl radicals towards visible light-driven degradation of gaseous toluene |
| title_full_unstemmed | Quantum-sized BiVO4 modified TiO2 microflower composite heterostructures: Efficient production of hydroxyl radicals towards visible light-driven degradation of gaseous toluene |
| title_short | Quantum-sized BiVO4 modified TiO2 microflower composite heterostructures: Efficient production of hydroxyl radicals towards visible light-driven degradation of gaseous toluene |
| title_sort | quantum-sized bivo4 modified tio2 microflower composite heterostructures: efficient production of hydroxyl radicals towards visible light-driven degradation of gaseous toluene |
| url | http://hdl.handle.net/20.500.11937/44537 |