Crystal transformation of 2D tungstic acid H2WO4 to WO3 for enhanced photocatalytic water oxidation
New photocatalytic materials for stable reduction and/or oxidization of water by harvesting a wider range of visible light are indispensable to achieve high practical efficiency in artificial photosynthesis. In this work, we prepared 2D WO 3 ·H 2 O and WO 3 nanosheets by a one-pot hydrothermal metho...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Published: |
Academic Press
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/61544 |
| _version_ | 1848760692502429696 |
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| author | Ke, J. Zhou, H. Liu, J. Duan, Xiaoguang Zhang, H. Liu, Shaomin Wang, Shaobin |
| author_facet | Ke, J. Zhou, H. Liu, J. Duan, Xiaoguang Zhang, H. Liu, Shaomin Wang, Shaobin |
| author_sort | Ke, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | New photocatalytic materials for stable reduction and/or oxidization of water by harvesting a wider range of visible light are indispensable to achieve high practical efficiency in artificial photosynthesis. In this work, we prepared 2D WO 3 ·H 2 O and WO 3 nanosheets by a one-pot hydrothermal method and sequent calcination, focusing on the effects of crystal transformation on band structure and photocatalytic performance for photocatalytic water oxidation in the presence of electron acceptors (Ag + ) under simulated solar light irradiation. The as-prepared WO 3 nanosheets exhibit enhanced rate of photocatalytic water oxidation, which is 6.3 and 3.6 times higher than that of WO 3 ·H 2 O nanosheets and commercial WO 3 , respectively. It is demonstrated that the releasing of water molecules in the crystal phase of tungstic acid results in transformation of the crystal phase from orthorhombic WO 3 ·H 2 O to monoclinic WO 3 , significantly improving the activity of photocatalytic water oxidation in the presence of Ag + because the shift-up of conduction band of WO 3 matches well with the electrode potential of Ag + /Ag(s), leading to efficient separation of photoinduced electrons and holes in pure WO 3 nanosheets. |
| first_indexed | 2025-11-14T10:19:49Z |
| format | Journal Article |
| id | curtin-20.500.11937-61544 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:19:49Z |
| publishDate | 2018 |
| publisher | Academic Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-615442020-01-06T08:28:13Z Crystal transformation of 2D tungstic acid H2WO4 to WO3 for enhanced photocatalytic water oxidation Ke, J. Zhou, H. Liu, J. Duan, Xiaoguang Zhang, H. Liu, Shaomin Wang, Shaobin New photocatalytic materials for stable reduction and/or oxidization of water by harvesting a wider range of visible light are indispensable to achieve high practical efficiency in artificial photosynthesis. In this work, we prepared 2D WO 3 ·H 2 O and WO 3 nanosheets by a one-pot hydrothermal method and sequent calcination, focusing on the effects of crystal transformation on band structure and photocatalytic performance for photocatalytic water oxidation in the presence of electron acceptors (Ag + ) under simulated solar light irradiation. The as-prepared WO 3 nanosheets exhibit enhanced rate of photocatalytic water oxidation, which is 6.3 and 3.6 times higher than that of WO 3 ·H 2 O nanosheets and commercial WO 3 , respectively. It is demonstrated that the releasing of water molecules in the crystal phase of tungstic acid results in transformation of the crystal phase from orthorhombic WO 3 ·H 2 O to monoclinic WO 3 , significantly improving the activity of photocatalytic water oxidation in the presence of Ag + because the shift-up of conduction band of WO 3 matches well with the electrode potential of Ag + /Ag(s), leading to efficient separation of photoinduced electrons and holes in pure WO 3 nanosheets. 2018 Journal Article http://hdl.handle.net/20.500.11937/61544 10.1016/j.jcis.2017.12.066 Academic Press fulltext |
| spellingShingle | Ke, J. Zhou, H. Liu, J. Duan, Xiaoguang Zhang, H. Liu, Shaomin Wang, Shaobin Crystal transformation of 2D tungstic acid H2WO4 to WO3 for enhanced photocatalytic water oxidation |
| title | Crystal transformation of 2D tungstic acid H2WO4 to WO3 for enhanced photocatalytic water oxidation |
| title_full | Crystal transformation of 2D tungstic acid H2WO4 to WO3 for enhanced photocatalytic water oxidation |
| title_fullStr | Crystal transformation of 2D tungstic acid H2WO4 to WO3 for enhanced photocatalytic water oxidation |
| title_full_unstemmed | Crystal transformation of 2D tungstic acid H2WO4 to WO3 for enhanced photocatalytic water oxidation |
| title_short | Crystal transformation of 2D tungstic acid H2WO4 to WO3 for enhanced photocatalytic water oxidation |
| title_sort | crystal transformation of 2d tungstic acid h2wo4 to wo3 for enhanced photocatalytic water oxidation |
| url | http://hdl.handle.net/20.500.11937/61544 |