Charge modulation at atomic-level through substitutional sulfur doping into atomically thin Bi₂ WO₆ toward promoting photocatalytic CO₂ reduction
Photocatalytic reduction of CO2 has attracted enormous interest as a sustainable and renewable source of energy. In the past decade, numerous bulk-type semiconductors have been developed, but the existing designs suffer many limitations, namely rapid recombination of charge carriers and weak light a...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Online Access: | https://hdl.handle.net/10356/163084 |
| _version_ | 1826122392722735104 |
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| author | Teh, Yee Wen Er, Chen-Chen Kong, Xin Ying Ng, Boon-Junn Yong, Siek-Ting Chai, Siang-Piao |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Teh, Yee Wen Er, Chen-Chen Kong, Xin Ying Ng, Boon-Junn Yong, Siek-Ting Chai, Siang-Piao |
| author_sort | Teh, Yee Wen |
| collection | NTU |
| description | Photocatalytic reduction of CO2 has attracted enormous interest as a sustainable and renewable source of energy. In the past decade, numerous bulk-type semiconductors have been developed, but the existing designs suffer many limitations, namely rapid recombination of charge carriers and weak light absorption ability. Herein, a bottom-up approach was developed to design atomically thin sulfur-doped Bi2 WO6 perovskite nanosheets (S-BWO) with improved reduction ability, extended visible light absorption, prolonged lifetime of charge carriers, enhanced adsorption of CO2 , and reduced work function. Compared with pristine Bi2 WO6 (P-BWO), S-BWO nanosheets exhibited a 3-fold improvement in photocatalytic reduction of CO2 under simulated sunlight irradiation. Experimental studies and density functional theory calculations revealed the synergistic roles of atomically thin nanosheets and S atoms in promoting photocatalytic efficiency. |
| first_indexed | 2024-10-01T05:47:45Z |
| format | Journal Article |
| id | ntu-10356/163084 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:47:45Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1630842023-02-28T20:05:20Z Charge modulation at atomic-level through substitutional sulfur doping into atomically thin Bi₂ WO₆ toward promoting photocatalytic CO₂ reduction Teh, Yee Wen Er, Chen-Chen Kong, Xin Ying Ng, Boon-Junn Yong, Siek-Ting Chai, Siang-Piao School of Physical and Mathematical Sciences Science::Chemistry Density Functional Theory Nanosheets Photocatalytic reduction of CO2 has attracted enormous interest as a sustainable and renewable source of energy. In the past decade, numerous bulk-type semiconductors have been developed, but the existing designs suffer many limitations, namely rapid recombination of charge carriers and weak light absorption ability. Herein, a bottom-up approach was developed to design atomically thin sulfur-doped Bi2 WO6 perovskite nanosheets (S-BWO) with improved reduction ability, extended visible light absorption, prolonged lifetime of charge carriers, enhanced adsorption of CO2 , and reduced work function. Compared with pristine Bi2 WO6 (P-BWO), S-BWO nanosheets exhibited a 3-fold improvement in photocatalytic reduction of CO2 under simulated sunlight irradiation. Experimental studies and density functional theory calculations revealed the synergistic roles of atomically thin nanosheets and S atoms in promoting photocatalytic efficiency. Published version This work was funded by the Ministry of Higher Education (MOHE) Malaysia under the Fundamental Research Grant Scheme (FRGS). Project Number: FRGS/1/2019/TK02/MUSM/01/1. Open access publishing facilitated by Monash University, as part of the Wiley-Monash University agreement via the Council of Australian University Librarians. 2022-11-21T03:57:39Z 2022-11-21T03:57:39Z 2022 Journal Article Teh, Y. W., Er, C., Kong, X. Y., Ng, B., Yong, S. & Chai, S. (2022). Charge modulation at atomic-level through substitutional sulfur doping into atomically thin Bi₂ WO₆ toward promoting photocatalytic CO₂ reduction. ChemSusChem, 15(14), e202200471-. https://dx.doi.org/10.1002/cssc.202200471 1864-5631 https://hdl.handle.net/10356/163084 10.1002/cssc.202200471 35447013 2-s2.0-85130344354 14 15 e202200471 en ChemSusChem © 2022 The Authors. ChemSusChem published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. application/pdf |
| spellingShingle | Science::Chemistry Density Functional Theory Nanosheets Teh, Yee Wen Er, Chen-Chen Kong, Xin Ying Ng, Boon-Junn Yong, Siek-Ting Chai, Siang-Piao Charge modulation at atomic-level through substitutional sulfur doping into atomically thin Bi₂ WO₆ toward promoting photocatalytic CO₂ reduction |
| title | Charge modulation at atomic-level through substitutional sulfur doping into atomically thin Bi₂ WO₆ toward promoting photocatalytic CO₂ reduction |
| title_full | Charge modulation at atomic-level through substitutional sulfur doping into atomically thin Bi₂ WO₆ toward promoting photocatalytic CO₂ reduction |
| title_fullStr | Charge modulation at atomic-level through substitutional sulfur doping into atomically thin Bi₂ WO₆ toward promoting photocatalytic CO₂ reduction |
| title_full_unstemmed | Charge modulation at atomic-level through substitutional sulfur doping into atomically thin Bi₂ WO₆ toward promoting photocatalytic CO₂ reduction |
| title_short | Charge modulation at atomic-level through substitutional sulfur doping into atomically thin Bi₂ WO₆ toward promoting photocatalytic CO₂ reduction |
| title_sort | charge modulation at atomic level through substitutional sulfur doping into atomically thin bi₂ wo₆ toward promoting photocatalytic co₂ reduction |
| topic | Science::Chemistry Density Functional Theory Nanosheets |
| url | https://hdl.handle.net/10356/163084 |
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