Synergistically enhanced charge separation in BiFeO3/Sn:TiO2 nanorod photoanode via bulk and surface dual modifications
Charge separation is regarded as a vital factor determining the photoelectrochemical (PEC) performance of TiO2 photoanode. Herein, for the first time, the synergistic effect between Sn doping and ferroelectric BiFeO3 (BFO) coating in BFO/Sn:TiO2 composite photoanode for enhanced PEC performance is r...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Online Access: | https://hdl.handle.net/10356/151350 |
| _version_ | 1826126999410704384 |
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| author | Huang, Jing Wang, Yang Liu, Xueqin Li, Yinchang Hu, Xiaoqin He, Bing Shu, Zhu Li, Zhen Zhao, Yanli |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Huang, Jing Wang, Yang Liu, Xueqin Li, Yinchang Hu, Xiaoqin He, Bing Shu, Zhu Li, Zhen Zhao, Yanli |
| author_sort | Huang, Jing |
| collection | NTU |
| description | Charge separation is regarded as a vital factor determining the photoelectrochemical (PEC) performance of TiO2 photoanode. Herein, for the first time, the synergistic effect between Sn doping and ferroelectric BiFeO3 (BFO) coating in BFO/Sn:TiO2 composite photoanode for enhanced PEC performance is reported. The Sn doping leads to enhanced charge carrier density due to efficient charge separation. After the deposition of ferroelectric BFO thin film, the charge-separation efficiency (ηsep) is further enhanced because of spontaneous polarization of the BFO layer. More importantly, the PEC performance could be further improved by positive polarization of the BFO/Sn:TiO2 composite photoanode, achieving remarkable photocurrent density (Jph) of 1.76 mA cm−2 at 1.23 V vs. reversible hydrogen electrode and high stability. This work indicates that the dual modification (i.e. Sn doping in bulk and ferroelectric BFO thin film deposition on the surface) holds a great promise in improving the PEC performance of photoanodes by promoting charge separation, which can be extended to other common photoanode materials, such as Fe2O3 and BiVO4. |
| first_indexed | 2024-10-01T07:01:36Z |
| format | Journal Article |
| id | ntu-10356/151350 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:01:36Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1513502021-06-22T09:29:09Z Synergistically enhanced charge separation in BiFeO3/Sn:TiO2 nanorod photoanode via bulk and surface dual modifications Huang, Jing Wang, Yang Liu, Xueqin Li, Yinchang Hu, Xiaoqin He, Bing Shu, Zhu Li, Zhen Zhao, Yanli School of Physical and Mathematical Sciences Science::Chemistry Charge Separation Ferroelectric Materials Charge separation is regarded as a vital factor determining the photoelectrochemical (PEC) performance of TiO2 photoanode. Herein, for the first time, the synergistic effect between Sn doping and ferroelectric BiFeO3 (BFO) coating in BFO/Sn:TiO2 composite photoanode for enhanced PEC performance is reported. The Sn doping leads to enhanced charge carrier density due to efficient charge separation. After the deposition of ferroelectric BFO thin film, the charge-separation efficiency (ηsep) is further enhanced because of spontaneous polarization of the BFO layer. More importantly, the PEC performance could be further improved by positive polarization of the BFO/Sn:TiO2 composite photoanode, achieving remarkable photocurrent density (Jph) of 1.76 mA cm−2 at 1.23 V vs. reversible hydrogen electrode and high stability. This work indicates that the dual modification (i.e. Sn doping in bulk and ferroelectric BFO thin film deposition on the surface) holds a great promise in improving the PEC performance of photoanodes by promoting charge separation, which can be extended to other common photoanode materials, such as Fe2O3 and BiVO4. Ministry of Education (MOE) The work was supported by the National Natural Science Foundation of China (41502030), the Natural Science Foundation of Hubei Province of China (2017CFB190), the Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) (CUG170638), and the Open Foundation of Engineering Research Center of Nano-Geomaterials of Ministry of Education (NGM2017KF002 and NGM2018KF017). This research is also supported by the Singapore Academic Research Fund (RG5/16, RG11/17 and RG114/17). 2021-06-22T09:29:09Z 2021-06-22T09:29:09Z 2019 Journal Article Huang, J., Wang, Y., Liu, X., Li, Y., Hu, X., He, B., Shu, Z., Li, Z. & Zhao, Y. (2019). Synergistically enhanced charge separation in BiFeO3/Sn:TiO2 nanorod photoanode via bulk and surface dual modifications. Nano Energy, 59, 33-40. https://dx.doi.org/10.1016/j.nanoen.2019.02.025 2211-2855 https://hdl.handle.net/10356/151350 10.1016/j.nanoen.2019.02.025 2-s2.0-85061546723 59 33 40 en RG5/16 RG11/17 RG114/17 Nano Energy © 2019 Elsevier Ltd. All rights reserved. |
| spellingShingle | Science::Chemistry Charge Separation Ferroelectric Materials Huang, Jing Wang, Yang Liu, Xueqin Li, Yinchang Hu, Xiaoqin He, Bing Shu, Zhu Li, Zhen Zhao, Yanli Synergistically enhanced charge separation in BiFeO3/Sn:TiO2 nanorod photoanode via bulk and surface dual modifications |
| title | Synergistically enhanced charge separation in BiFeO3/Sn:TiO2 nanorod photoanode via bulk and surface dual modifications |
| title_full | Synergistically enhanced charge separation in BiFeO3/Sn:TiO2 nanorod photoanode via bulk and surface dual modifications |
| title_fullStr | Synergistically enhanced charge separation in BiFeO3/Sn:TiO2 nanorod photoanode via bulk and surface dual modifications |
| title_full_unstemmed | Synergistically enhanced charge separation in BiFeO3/Sn:TiO2 nanorod photoanode via bulk and surface dual modifications |
| title_short | Synergistically enhanced charge separation in BiFeO3/Sn:TiO2 nanorod photoanode via bulk and surface dual modifications |
| title_sort | synergistically enhanced charge separation in bifeo3 sn tio2 nanorod photoanode via bulk and surface dual modifications |
| topic | Science::Chemistry Charge Separation Ferroelectric Materials |
| url | https://hdl.handle.net/10356/151350 |
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