Amorphous TiO2 coated hierarchical WO3 nanosheet/CdS nanorod arrays for improved photoelectrochemical performance
This work demonstrates hierarchical WO nanosheet/CdS nanorod (WO -NS/CdS-NR) arrays as a type-II heterojunction photoanode for improved photoelectrochemical (PEC) water splitting. Due to the synergistic effect of different constituents in the novel hierarchical structure, WO -NS/CdS-NR arrays as a...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/149240 |
| _version_ | 1811694145797881856 |
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| author | Wang, Zhiwei Yang, Guang Tan, Chiew Kei Nguyen, Tam Duy Tok, Alfred Iing Yoong |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Wang, Zhiwei Yang, Guang Tan, Chiew Kei Nguyen, Tam Duy Tok, Alfred Iing Yoong |
| author_sort | Wang, Zhiwei |
| collection | NTU |
| description | This work demonstrates hierarchical WO nanosheet/CdS nanorod (WO -NS/CdS-NR) arrays as a type-II heterojunction photoanode for improved photoelectrochemical (PEC) water splitting. Due to the synergistic effect of different constituents in the novel hierarchical structure, WO -NS/CdS-NR arrays as a photoanode yield a photocurrent density of 5.4 mA cm at 0.8 V versus reversible hydrogen electrode for sulfite oxidation. This is 12 times that of WO -NS arrays (0.45 mA cm ) and 3 times that of CdS-NR arrays (1.85 mA cm ). In this hybrid WO -NS/CdS-NR arrays photoanode, the favorable heterojunction between WO and CdS enhances the charge separation efficiency and widens the light absorption spectrum. Furthermore, the optimization of the loading amount and size of CdS-NRs allows for a larger specific surface area as well as more effective light scattering, which further improves the PEC performance of WO -NS/CdS-NR arrays. Finally, the coating of an ultrathin layer of amorphous TiO also enhances the photostability of WO -NS/CdS-NR arrays. |
| first_indexed | 2024-10-01T07:02:56Z |
| format | Journal Article |
| id | ntu-10356/149240 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:02:56Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1492402023-07-14T16:03:59Z Amorphous TiO2 coated hierarchical WO3 nanosheet/CdS nanorod arrays for improved photoelectrochemical performance Wang, Zhiwei Yang, Guang Tan, Chiew Kei Nguyen, Tam Duy Tok, Alfred Iing Yoong School of Materials Science and Engineering Engineering::Materials Photoanode CdS Nanorod This work demonstrates hierarchical WO nanosheet/CdS nanorod (WO -NS/CdS-NR) arrays as a type-II heterojunction photoanode for improved photoelectrochemical (PEC) water splitting. Due to the synergistic effect of different constituents in the novel hierarchical structure, WO -NS/CdS-NR arrays as a photoanode yield a photocurrent density of 5.4 mA cm at 0.8 V versus reversible hydrogen electrode for sulfite oxidation. This is 12 times that of WO -NS arrays (0.45 mA cm ) and 3 times that of CdS-NR arrays (1.85 mA cm ). In this hybrid WO -NS/CdS-NR arrays photoanode, the favorable heterojunction between WO and CdS enhances the charge separation efficiency and widens the light absorption spectrum. Furthermore, the optimization of the loading amount and size of CdS-NRs allows for a larger specific surface area as well as more effective light scattering, which further improves the PEC performance of WO -NS/CdS-NR arrays. Finally, the coating of an ultrathin layer of amorphous TiO also enhances the photostability of WO -NS/CdS-NR arrays. Ministry of Education (MOE) Accepted version Ministry of Education - Singapore Singapore Ministry of Education Academic Research Fund Tier 2 2021-06-01T07:57:01Z 2021-06-01T07:57:01Z 2019 Journal Article Wang, Z., Yang, G., Tan, C. K., Nguyen, T. D. & Tok, A. I. Y. (2019). Amorphous TiO2 coated hierarchical WO3 nanosheet/CdS nanorod arrays for improved photoelectrochemical performance. Applied Surface Science, 490, 411-419. https://dx.doi.org/10.1016/j.apsusc.2019.06.090 0169-4332 https://hdl.handle.net/10356/149240 10.1016/j.apsusc.2019.06.090 2-s2.0-85067798312 490 411 419 en MOE2014-T2-2-082 Applied Surface Science © 2019 Elsevier B.V. All rights reserved. This paper was published in Applied Surface Science and is made available with permission of Elsevier B.V. application/pdf |
| spellingShingle | Engineering::Materials Photoanode CdS Nanorod Wang, Zhiwei Yang, Guang Tan, Chiew Kei Nguyen, Tam Duy Tok, Alfred Iing Yoong Amorphous TiO2 coated hierarchical WO3 nanosheet/CdS nanorod arrays for improved photoelectrochemical performance |
| title | Amorphous TiO2 coated hierarchical WO3 nanosheet/CdS nanorod arrays for improved photoelectrochemical performance |
| title_full | Amorphous TiO2 coated hierarchical WO3 nanosheet/CdS nanorod arrays for improved photoelectrochemical performance |
| title_fullStr | Amorphous TiO2 coated hierarchical WO3 nanosheet/CdS nanorod arrays for improved photoelectrochemical performance |
| title_full_unstemmed | Amorphous TiO2 coated hierarchical WO3 nanosheet/CdS nanorod arrays for improved photoelectrochemical performance |
| title_short | Amorphous TiO2 coated hierarchical WO3 nanosheet/CdS nanorod arrays for improved photoelectrochemical performance |
| title_sort | amorphous tio2 coated hierarchical wo3 nanosheet cds nanorod arrays for improved photoelectrochemical performance |
| topic | Engineering::Materials Photoanode CdS Nanorod |
| url | https://hdl.handle.net/10356/149240 |
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