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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...

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Main Authors: 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
Format: Article
Published: American Chemical Society 2020
Online Access:http://psasir.upm.edu.my/id/eprint/86408/
https://pubs.acs.org/doi/pdf/10.1021/acs.jpcc.0c03967
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spelling my.upm.eprints.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
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
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.
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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
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
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
title 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_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_sort tunable plasmon-induced charge transport and photon absorption of bimetallic au-ag nanoparticles on zno photoanode for photoelectrochemical enhancement under visible light
publisher American Chemical Society
publishDate 2020
url http://psasir.upm.edu.my/id/eprint/86408/
https://pubs.acs.org/doi/pdf/10.1021/acs.jpcc.0c03967
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score 13.211869

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