Heteroepitaxial approach to explore charge dynamics across Au/BiVO4 interface for photoactivity enhancement

Chien Nguyen Van, Wei Sea Chang, Jhih Wei Chen, Kai An Tsai, Wen Yen Tzeng, Yan Cheng Lin, Ho Hung Kuo, Heng Jui Liu, Kao Der Chang, Wu Ching Chou, Chung Lin Wu, Yi Chun Chen, Chih Wei Luo, Yung Jung Hsu, Ying Hao Chu

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Heterostructure provides a powerful route in manipulating electrical transport, optical response, electrolytic water splitting and water treatment of complex oxides. As a model for noble metal/ complex oxide heterostructures, we have successfully prepared Au/BiVO4 (BVO) heterostructures in which the Au nanoparticles (NPs) with various sizes and densities were uniformly deposited on the {001} facets of epitaxial BVO thin films. The heterostructures exhibit significantly enhanced photoactivities in both dye degradation and electrolytic water splitting. By employing X-ray photoelectron spectroscopy, the energy band alignment of Au/BVO heterojunction suggests a charge separation at their interfaces, that can manipulate the photoexcited electron-hole pairs and photocatalytic efficiency of the heterostructures. Photogenerated carrier injection, which mainly affects the photoactivity of photocatalysis, was detected across Au/BVO interfaces by ultrafast dynamics spectroscopy. This study delivers a general approach to probe and understand the photochemistry of noble metal-complex oxide heterostructures for photoconversion applications.

Original languageEnglish
Pages (from-to)625-633
Number of pages9
JournalNano Energy
Volume15
DOIs
Publication statusPublished - 2015 Jul 1

Fingerprint

Heterojunctions
Oxides
Coordination Complexes
Precious metals
Metal complexes
Water
Photocatalysis
Photochemical reactions
Epitaxial films
bismuth vanadium tetraoxide
Water treatment
Band structure
Coloring Agents
X ray photoelectron spectroscopy
Dyes
Spectroscopy
Nanoparticles
Degradation
Thin films
Electrons

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

Cite this

Van, Chien Nguyen ; Chang, Wei Sea ; Chen, Jhih Wei ; Tsai, Kai An ; Tzeng, Wen Yen ; Lin, Yan Cheng ; Kuo, Ho Hung ; Liu, Heng Jui ; Chang, Kao Der ; Chou, Wu Ching ; Wu, Chung Lin ; Chen, Yi Chun ; Luo, Chih Wei ; Hsu, Yung Jung ; Chu, Ying Hao. / Heteroepitaxial approach to explore charge dynamics across Au/BiVO4 interface for photoactivity enhancement. In: Nano Energy. 2015 ; Vol. 15. pp. 625-633.
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abstract = "Heterostructure provides a powerful route in manipulating electrical transport, optical response, electrolytic water splitting and water treatment of complex oxides. As a model for noble metal/ complex oxide heterostructures, we have successfully prepared Au/BiVO4 (BVO) heterostructures in which the Au nanoparticles (NPs) with various sizes and densities were uniformly deposited on the {001} facets of epitaxial BVO thin films. The heterostructures exhibit significantly enhanced photoactivities in both dye degradation and electrolytic water splitting. By employing X-ray photoelectron spectroscopy, the energy band alignment of Au/BVO heterojunction suggests a charge separation at their interfaces, that can manipulate the photoexcited electron-hole pairs and photocatalytic efficiency of the heterostructures. Photogenerated carrier injection, which mainly affects the photoactivity of photocatalysis, was detected across Au/BVO interfaces by ultrafast dynamics spectroscopy. This study delivers a general approach to probe and understand the photochemistry of noble metal-complex oxide heterostructures for photoconversion applications.",
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Van, CN, Chang, WS, Chen, JW, Tsai, KA, Tzeng, WY, Lin, YC, Kuo, HH, Liu, HJ, Chang, KD, Chou, WC, Wu, CL, Chen, YC, Luo, CW, Hsu, YJ & Chu, YH 2015, 'Heteroepitaxial approach to explore charge dynamics across Au/BiVO4 interface for photoactivity enhancement', Nano Energy, vol. 15, pp. 625-633. https://doi.org/10.1016/j.nanoen.2015.05.024

Heteroepitaxial approach to explore charge dynamics across Au/BiVO4 interface for photoactivity enhancement. / Van, Chien Nguyen; Chang, Wei Sea; Chen, Jhih Wei; Tsai, Kai An; Tzeng, Wen Yen; Lin, Yan Cheng; Kuo, Ho Hung; Liu, Heng Jui; Chang, Kao Der; Chou, Wu Ching; Wu, Chung Lin; Chen, Yi Chun; Luo, Chih Wei; Hsu, Yung Jung; Chu, Ying Hao.

In: Nano Energy, Vol. 15, 01.07.2015, p. 625-633.

Research output: Contribution to journalArticle

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T1 - Heteroepitaxial approach to explore charge dynamics across Au/BiVO4 interface for photoactivity enhancement

AU - Van, Chien Nguyen

AU - Chang, Wei Sea

AU - Chen, Jhih Wei

AU - Tsai, Kai An

AU - Tzeng, Wen Yen

AU - Lin, Yan Cheng

AU - Kuo, Ho Hung

AU - Liu, Heng Jui

AU - Chang, Kao Der

AU - Chou, Wu Ching

AU - Wu, Chung Lin

AU - Chen, Yi Chun

AU - Luo, Chih Wei

AU - Hsu, Yung Jung

AU - Chu, Ying Hao

PY - 2015/7/1

Y1 - 2015/7/1

N2 - Heterostructure provides a powerful route in manipulating electrical transport, optical response, electrolytic water splitting and water treatment of complex oxides. As a model for noble metal/ complex oxide heterostructures, we have successfully prepared Au/BiVO4 (BVO) heterostructures in which the Au nanoparticles (NPs) with various sizes and densities were uniformly deposited on the {001} facets of epitaxial BVO thin films. The heterostructures exhibit significantly enhanced photoactivities in both dye degradation and electrolytic water splitting. By employing X-ray photoelectron spectroscopy, the energy band alignment of Au/BVO heterojunction suggests a charge separation at their interfaces, that can manipulate the photoexcited electron-hole pairs and photocatalytic efficiency of the heterostructures. Photogenerated carrier injection, which mainly affects the photoactivity of photocatalysis, was detected across Au/BVO interfaces by ultrafast dynamics spectroscopy. This study delivers a general approach to probe and understand the photochemistry of noble metal-complex oxide heterostructures for photoconversion applications.

AB - Heterostructure provides a powerful route in manipulating electrical transport, optical response, electrolytic water splitting and water treatment of complex oxides. As a model for noble metal/ complex oxide heterostructures, we have successfully prepared Au/BiVO4 (BVO) heterostructures in which the Au nanoparticles (NPs) with various sizes and densities were uniformly deposited on the {001} facets of epitaxial BVO thin films. The heterostructures exhibit significantly enhanced photoactivities in both dye degradation and electrolytic water splitting. By employing X-ray photoelectron spectroscopy, the energy band alignment of Au/BVO heterojunction suggests a charge separation at their interfaces, that can manipulate the photoexcited electron-hole pairs and photocatalytic efficiency of the heterostructures. Photogenerated carrier injection, which mainly affects the photoactivity of photocatalysis, was detected across Au/BVO interfaces by ultrafast dynamics spectroscopy. This study delivers a general approach to probe and understand the photochemistry of noble metal-complex oxide heterostructures for photoconversion applications.

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