Construction of p-n heterojunction �-Bi2O3/BiVO4 nanocomposite with improved photoinduced charge transfer property and enhanced activity in degradation of ortho-dichlorobenzene
© 2017 Elsevier B.V. To achieve efficient conversion of solar to chemical energy in photocatalysis, development of visible-light-induced catalysts with high charge carrier mobility and superior activity is essential. In this work, a novel ß-Bi 2 O 3 /BiVO 4 nanocomposite with p-n heterojuction stru...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier BV
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/56145 |
| _version_ | 1848759797917155328 |
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| author | Sun, J. Li, X. Zhao, Q. Tade, Moses Liu, Shaomin |
| author_facet | Sun, J. Li, X. Zhao, Q. Tade, Moses Liu, Shaomin |
| author_sort | Sun, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017 Elsevier B.V. To achieve efficient conversion of solar to chemical energy in photocatalysis, development of visible-light-induced catalysts with high charge carrier mobility and superior activity is essential. In this work, a novel ß-Bi 2 O 3 /BiVO 4 nanocomposite with p-n heterojuction structure, which is assembled by interconnected quantum dots, has been successfully constructed through a facile approach. The structural and optical properties of the as-prepared materials were comparatively characterized. Steady-state and transient-state photoluminescence spectra demonstrate that the photo-induced charge carriers in ß-Bi 2 O 3 /BiVO 4 nanocomposite display higher separation and much longer lifetime than those in individual BiVO 4 samples, which is attributed to the formation of efficient interfacial electric field between ß-Bi 2 O 3 and BiVO 4 . The photocatalytic performance of the samples was explored by the degradation of ortho-dichlorobenzene (o-DCB). Electron spin resonance examinations confirmed that much more superoxide radicals were generated in the system of ß-Bi 2 O 3 /BiVO 4 nanocomposite, which could be mainly responsible for the outstanding activity. In addition, the adsorption and oxidation of o-DCB over the as-prepared materials were studied by in situ FTIR spectroscopy to investigate the nature of surface intermediates formed on the catalysts. To clarify charge migration route, a detailed photocatalytic mechanism in terms of the energy band structures is proposed. |
| first_indexed | 2025-11-14T10:05:36Z |
| format | Journal Article |
| id | curtin-20.500.11937-56145 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:05:36Z |
| publishDate | 2017 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-561452023-08-02T06:39:09Z Construction of p-n heterojunction �-Bi2O3/BiVO4 nanocomposite with improved photoinduced charge transfer property and enhanced activity in degradation of ortho-dichlorobenzene Sun, J. Li, X. Zhao, Q. Tade, Moses Liu, Shaomin © 2017 Elsevier B.V. To achieve efficient conversion of solar to chemical energy in photocatalysis, development of visible-light-induced catalysts with high charge carrier mobility and superior activity is essential. In this work, a novel ß-Bi 2 O 3 /BiVO 4 nanocomposite with p-n heterojuction structure, which is assembled by interconnected quantum dots, has been successfully constructed through a facile approach. The structural and optical properties of the as-prepared materials were comparatively characterized. Steady-state and transient-state photoluminescence spectra demonstrate that the photo-induced charge carriers in ß-Bi 2 O 3 /BiVO 4 nanocomposite display higher separation and much longer lifetime than those in individual BiVO 4 samples, which is attributed to the formation of efficient interfacial electric field between ß-Bi 2 O 3 and BiVO 4 . The photocatalytic performance of the samples was explored by the degradation of ortho-dichlorobenzene (o-DCB). Electron spin resonance examinations confirmed that much more superoxide radicals were generated in the system of ß-Bi 2 O 3 /BiVO 4 nanocomposite, which could be mainly responsible for the outstanding activity. In addition, the adsorption and oxidation of o-DCB over the as-prepared materials were studied by in situ FTIR spectroscopy to investigate the nature of surface intermediates formed on the catalysts. To clarify charge migration route, a detailed photocatalytic mechanism in terms of the energy band structures is proposed. 2017 Journal Article http://hdl.handle.net/20.500.11937/56145 10.1016/j.apcatb.2017.07.052 Elsevier BV restricted |
| spellingShingle | Sun, J. Li, X. Zhao, Q. Tade, Moses Liu, Shaomin Construction of p-n heterojunction �-Bi2O3/BiVO4 nanocomposite with improved photoinduced charge transfer property and enhanced activity in degradation of ortho-dichlorobenzene |
| title | Construction of p-n heterojunction �-Bi2O3/BiVO4 nanocomposite with improved photoinduced charge transfer property and enhanced activity in degradation of ortho-dichlorobenzene |
| title_full | Construction of p-n heterojunction �-Bi2O3/BiVO4 nanocomposite with improved photoinduced charge transfer property and enhanced activity in degradation of ortho-dichlorobenzene |
| title_fullStr | Construction of p-n heterojunction �-Bi2O3/BiVO4 nanocomposite with improved photoinduced charge transfer property and enhanced activity in degradation of ortho-dichlorobenzene |
| title_full_unstemmed | Construction of p-n heterojunction �-Bi2O3/BiVO4 nanocomposite with improved photoinduced charge transfer property and enhanced activity in degradation of ortho-dichlorobenzene |
| title_short | Construction of p-n heterojunction �-Bi2O3/BiVO4 nanocomposite with improved photoinduced charge transfer property and enhanced activity in degradation of ortho-dichlorobenzene |
| title_sort | construction of p-n heterojunction �-bi2o3/bivo4 nanocomposite with improved photoinduced charge transfer property and enhanced activity in degradation of ortho-dichlorobenzene |
| url | http://hdl.handle.net/20.500.11937/56145 |