Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light
We develop a composite photoanode by sensitizing TiO 2 nanorod arrays with PbS quantum dots (QDs) and CdS QDs. Benefitted from additional introduced PbS QDs and CdS QDs onto TiO 2 , the absorption of the composite photoanodes are broaden from UV to visible region. The experimental results showed tha...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2015
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| Online Access: | https://hdl.handle.net/10356/81077 http://hdl.handle.net/10220/39112 |
| _version_ | 1826116568713527296 |
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| author | Li, Lei Dai, Haitao Feng, Liefeng Luo, Dan Wang, Shuguo Sun, Xiaowei |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Li, Lei Dai, Haitao Feng, Liefeng Luo, Dan Wang, Shuguo Sun, Xiaowei |
| author_sort | Li, Lei |
| collection | NTU |
| description | We develop a composite photoanode by sensitizing TiO 2 nanorod arrays with PbS quantum dots (QDs) and CdS QDs. Benefitted from additional introduced PbS QDs and CdS QDs onto TiO 2 , the absorption of the composite photoanodes are broaden from UV to visible region. The experimental results showed that the PbS sandwiched between TiO 2 and CdS cannot only broad the absorption properties but also improve the stability. The stability can be explained by the hole facile transmission from PbS to CdS because of the valence band offsets between PbS and CdS which cause a small energy barrier and reduce the hole accumulation. The photocurrent density reached 1.35 mA cm −2 at 0.9716 V vs. RHE (0 V vs. Ag/AgCl, under 60 mW cm −2 illumination) for TiO 2 /PbS/CdS. The highest photocurrent of TiO 2 /PbS/CdS can be explained by the smallest of total resistance (138 Ω cm −2 ) compared to TiO 2 /CdS and pristine TiO 2 . |
| first_indexed | 2024-10-01T04:13:53Z |
| format | Journal Article |
| id | ntu-10356/81077 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:13:53Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/810772022-02-16T16:31:10Z Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light Li, Lei Dai, Haitao Feng, Liefeng Luo, Dan Wang, Shuguo Sun, Xiaowei School of Electrical and Electronic Engineering Solar water splitting Photoelectrochemical Hydrogen generation We develop a composite photoanode by sensitizing TiO 2 nanorod arrays with PbS quantum dots (QDs) and CdS QDs. Benefitted from additional introduced PbS QDs and CdS QDs onto TiO 2 , the absorption of the composite photoanodes are broaden from UV to visible region. The experimental results showed that the PbS sandwiched between TiO 2 and CdS cannot only broad the absorption properties but also improve the stability. The stability can be explained by the hole facile transmission from PbS to CdS because of the valence band offsets between PbS and CdS which cause a small energy barrier and reduce the hole accumulation. The photocurrent density reached 1.35 mA cm −2 at 0.9716 V vs. RHE (0 V vs. Ag/AgCl, under 60 mW cm −2 illumination) for TiO 2 /PbS/CdS. The highest photocurrent of TiO 2 /PbS/CdS can be explained by the smallest of total resistance (138 Ω cm −2 ) compared to TiO 2 /CdS and pristine TiO 2 . Published version 2015-12-17T01:37:44Z 2019-12-06T14:20:58Z 2015-12-17T01:37:44Z 2019-12-06T14:20:58Z 2015 Journal Article Li, L., Dai, H., Feng, L., Luo, D., Wang, S., & Sun, X. (2015). Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light. Nanoscale Research Letters, 10, 418-. 1931-7573 https://hdl.handle.net/10356/81077 http://hdl.handle.net/10220/39112 10.1186/s11671-015-1129-3 26497733 en Nanoscale Research Letters © 2015 Li et al. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 7 p. application/pdf |
| spellingShingle | Solar water splitting Photoelectrochemical Hydrogen generation Li, Lei Dai, Haitao Feng, Liefeng Luo, Dan Wang, Shuguo Sun, Xiaowei Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light |
| title | Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light |
| title_full | Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light |
| title_fullStr | Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light |
| title_full_unstemmed | Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light |
| title_short | Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light |
| title_sort | enhance photoelectrochemical hydrogen generation activity and stability of tio2 nanorod arrays sensitized by pbs and cds quantum dots under uv visible light |
| topic | Solar water splitting Photoelectrochemical Hydrogen generation |
| url | https://hdl.handle.net/10356/81077 http://hdl.handle.net/10220/39112 |
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