Tunable plasmon-induced charge transport and photon absorption of bimetallic Au-Ag nanoparticles on ZnO photoanode for photoelectrochemical enhancement under visible light
Noble metal nanostructures have been widely explored as an effective method to increase photon absorption and charge separation in plasmonic photocatalysis. In this study, we integrated two different noble metals, gold (Au) and silver (Ag), into Au/Ag bimetallic nanoparticles (BNPs) via solid-state...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
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American Chemical Society
2020
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| Online Access: | http://psasir.upm.edu.my/id/eprint/86408/ |
| _version_ | 1848860223708594176 |
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| author | Lim, Fang Sheng Tan, Sin Tee Zhu, Yuanmin Chen, Jhih-Wei Wu, Bao Yu, Hao Kim, Jung-Mu Ginting, Riski Titian Ginting Lau, Kam Sheng Chia, Chin Hua Wu, HengAn Gu, Meng Chang, Wei Sea |
| author_facet | Lim, Fang Sheng Tan, Sin Tee Zhu, Yuanmin Chen, Jhih-Wei Wu, Bao Yu, Hao Kim, Jung-Mu Ginting, Riski Titian Ginting Lau, Kam Sheng Chia, Chin Hua Wu, HengAn Gu, Meng Chang, Wei Sea |
| author_sort | Lim, Fang Sheng |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Noble metal nanostructures have been widely explored as an effective method to increase photon absorption and charge separation in plasmonic photocatalysis. In this study, we integrated two different noble metals, gold (Au) and silver (Ag), into Au/Ag bimetallic nanoparticles (BNPs) via solid-state thermal dewetting to investigate the room-temperature electrical conductivity, visible light absorption, and its effect on photoelectrochemical (PEC) activity. The Au/Ag BNPs give rise to extended visible light absorption range, exhibiting localized surface plasmon resonance (LSPR) effect that lead to strong surface-enhanced Raman spectroscopy. X-ray photoelectron spectroscopy shows binding energy shift in Au/Ag BNPs, suggesting electron transfer from Ag to Au where charge transport behavior can be tailored. Kelvin probe force microscopy and conductive atomic force microscopy displayed a significantly enhanced electrical conduction in Au/Ag BNPs due to the lowered Schottky barrier height. When the Au/Ag BNPs are incorporated onto ZnO semiconductor photoanode, the photoactivity was improved with lower charge transport resistance compared to monometallic and pristine ZnO. This work delivers a general approach to understand the plasmon-induced charge interaction, hence the photochemistry of noble metal BNP/semiconductor photoanode by incorporating a controllable composition ratio, which is capable of exploiting the enhanced electrical conduction and LSPR effect for PEC water splitting. |
| first_indexed | 2025-11-15T12:41:49Z |
| format | Article |
| id | upm-86408 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T12:41:49Z |
| publishDate | 2020 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-864082022-10-19T01:28:31Z http://psasir.upm.edu.my/id/eprint/86408/ Tunable plasmon-induced charge transport and photon absorption of bimetallic Au-Ag nanoparticles on ZnO photoanode for photoelectrochemical enhancement under visible light Lim, Fang Sheng Tan, Sin Tee Zhu, Yuanmin Chen, Jhih-Wei Wu, Bao Yu, Hao Kim, Jung-Mu Ginting, Riski Titian Ginting Lau, Kam Sheng Chia, Chin Hua Wu, HengAn Gu, Meng Chang, Wei Sea Noble metal nanostructures have been widely explored as an effective method to increase photon absorption and charge separation in plasmonic photocatalysis. In this study, we integrated two different noble metals, gold (Au) and silver (Ag), into Au/Ag bimetallic nanoparticles (BNPs) via solid-state thermal dewetting to investigate the room-temperature electrical conductivity, visible light absorption, and its effect on photoelectrochemical (PEC) activity. The Au/Ag BNPs give rise to extended visible light absorption range, exhibiting localized surface plasmon resonance (LSPR) effect that lead to strong surface-enhanced Raman spectroscopy. X-ray photoelectron spectroscopy shows binding energy shift in Au/Ag BNPs, suggesting electron transfer from Ag to Au where charge transport behavior can be tailored. Kelvin probe force microscopy and conductive atomic force microscopy displayed a significantly enhanced electrical conduction in Au/Ag BNPs due to the lowered Schottky barrier height. When the Au/Ag BNPs are incorporated onto ZnO semiconductor photoanode, the photoactivity was improved with lower charge transport resistance compared to monometallic and pristine ZnO. This work delivers a general approach to understand the plasmon-induced charge interaction, hence the photochemistry of noble metal BNP/semiconductor photoanode by incorporating a controllable composition ratio, which is capable of exploiting the enhanced electrical conduction and LSPR effect for PEC water splitting. American Chemical Society 2020 Article PeerReviewed Lim, Fang Sheng and Tan, Sin Tee and Zhu, Yuanmin and Chen, Jhih-Wei and Wu, Bao and Yu, Hao and Kim, Jung-Mu and Ginting, Riski Titian Ginting and Lau, Kam Sheng and Chia, Chin Hua and Wu, HengAn and Gu, Meng and Chang, Wei Sea (2020) Tunable plasmon-induced charge transport and photon absorption of bimetallic Au-Ag nanoparticles on ZnO photoanode for photoelectrochemical enhancement under visible light. Journal of Physical Chemistry C, 124 (26). 14105 - 14117. ISSN 1932-7447; ESSN: 1932-7455 https://pubs.acs.org/doi/pdf/10.1021/acs.jpcc.0c03967 10.1021/acs.jpcc.0c03967 |
| spellingShingle | Lim, Fang Sheng Tan, Sin Tee Zhu, Yuanmin Chen, Jhih-Wei Wu, Bao Yu, Hao Kim, Jung-Mu Ginting, Riski Titian Ginting Lau, Kam Sheng Chia, Chin Hua Wu, HengAn Gu, Meng Chang, Wei Sea Tunable plasmon-induced charge transport and photon absorption of bimetallic Au-Ag nanoparticles on ZnO photoanode for photoelectrochemical enhancement under visible light |
| title | Tunable plasmon-induced charge transport and photon absorption of bimetallic Au-Ag nanoparticles on ZnO photoanode for photoelectrochemical enhancement under visible light |
| title_full | Tunable plasmon-induced charge transport and photon absorption of bimetallic Au-Ag nanoparticles on ZnO photoanode for photoelectrochemical enhancement under visible light |
| title_fullStr | Tunable plasmon-induced charge transport and photon absorption of bimetallic Au-Ag nanoparticles on ZnO photoanode for photoelectrochemical enhancement under visible light |
| title_full_unstemmed | Tunable plasmon-induced charge transport and photon absorption of bimetallic Au-Ag nanoparticles on ZnO photoanode for photoelectrochemical enhancement under visible light |
| title_short | Tunable plasmon-induced charge transport and photon absorption of bimetallic Au-Ag nanoparticles on ZnO photoanode for photoelectrochemical enhancement under visible light |
| title_sort | tunable plasmon-induced charge transport and photon absorption of bimetallic au-ag nanoparticles on zno photoanode for photoelectrochemical enhancement under visible light |
| url | http://psasir.upm.edu.my/id/eprint/86408/ http://psasir.upm.edu.my/id/eprint/86408/ http://psasir.upm.edu.my/id/eprint/86408/ |