Au@Cu2O core@shell nanocrystals as dual-functional catalysts for sustainable environmental applications

Ming Yu Kuo, Chih Feng Hsiao, Yi Hsuan Chiu, Ting Hsuan Lai, Mei Jing Fang, Jhen Yang Wu, Jhih Wei Chen, Chung-Lin Wu, Kung Hwa Wei, Hsin Chieh Lin, Yung Jung Hsu

Research output: Contribution to journalArticle

Abstract

This work reports the synthesis of Au@Cu2O core@shell nanocrystals with controllable shell thicknesses and demonstrates their use as the dual-functional catalyst that can continuously operate under illumination and darkness conditions for efficient E. coli inactivation. On account of the peroxidase mimics of the Au core and Fenton reactivity of the Cu2O shell, the Au@Cu2O nanocrystals exhibit intrinsic peroxidase-like property with the reaction kinetics in accordance with the typical Michaelis–Menten mechanism. On the other hand, time-resolved photoluminescence spectra suggest the prevalence of pronounced charge separation for Au@Cu2O nanocrystals, an important advantage that is favourable for photocatalysis. By combining the photocatalytic capability with the peroxidase mimics features, Au@Cu2O nanocrystals can perform practical photocatalytic decomposition of E. coli under visible light illumination but still show vital activity towards E. coli inactivation after light illumination was turned off. The current study delivers a new catalyst configuration by exploiting the multiple functionalities of nanosized Au and Cu2O for advanced environmental and energy conversion applications.

LanguageEnglish
Pages499-506
Number of pages8
JournalApplied Catalysis B: Environmental
Volume242
DOIs
Publication statusPublished - 2019 Mar 1

Fingerprint

Photocatalysis
Nanocrystals
catalyst
shell
Escherichia coli
Peroxidase
Catalysts
Lighting
reaction kinetics
Energy conversion
Reaction kinetics
decomposition
Photoluminescence
Decomposition

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

Cite this

Kuo, Ming Yu ; Hsiao, Chih Feng ; Chiu, Yi Hsuan ; Lai, Ting Hsuan ; Fang, Mei Jing ; Wu, Jhen Yang ; Chen, Jhih Wei ; Wu, Chung-Lin ; Wei, Kung Hwa ; Lin, Hsin Chieh ; Hsu, Yung Jung. / Au@Cu2O core@shell nanocrystals as dual-functional catalysts for sustainable environmental applications. In: Applied Catalysis B: Environmental. 2019 ; Vol. 242. pp. 499-506.
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abstract = "This work reports the synthesis of Au@Cu2O core@shell nanocrystals with controllable shell thicknesses and demonstrates their use as the dual-functional catalyst that can continuously operate under illumination and darkness conditions for efficient E. coli inactivation. On account of the peroxidase mimics of the Au core and Fenton reactivity of the Cu2O shell, the Au@Cu2O nanocrystals exhibit intrinsic peroxidase-like property with the reaction kinetics in accordance with the typical Michaelis–Menten mechanism. On the other hand, time-resolved photoluminescence spectra suggest the prevalence of pronounced charge separation for Au@Cu2O nanocrystals, an important advantage that is favourable for photocatalysis. By combining the photocatalytic capability with the peroxidase mimics features, Au@Cu2O nanocrystals can perform practical photocatalytic decomposition of E. coli under visible light illumination but still show vital activity towards E. coli inactivation after light illumination was turned off. The current study delivers a new catalyst configuration by exploiting the multiple functionalities of nanosized Au and Cu2O for advanced environmental and energy conversion applications.",
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Kuo, MY, Hsiao, CF, Chiu, YH, Lai, TH, Fang, MJ, Wu, JY, Chen, JW, Wu, C-L, Wei, KH, Lin, HC & Hsu, YJ 2019, 'Au@Cu2O core@shell nanocrystals as dual-functional catalysts for sustainable environmental applications' Applied Catalysis B: Environmental, vol. 242, pp. 499-506. https://doi.org/10.1016/j.apcatb.2018.09.075

Au@Cu2O core@shell nanocrystals as dual-functional catalysts for sustainable environmental applications. / Kuo, Ming Yu; Hsiao, Chih Feng; Chiu, Yi Hsuan; Lai, Ting Hsuan; Fang, Mei Jing; Wu, Jhen Yang; Chen, Jhih Wei; Wu, Chung-Lin; Wei, Kung Hwa; Lin, Hsin Chieh; Hsu, Yung Jung.

In: Applied Catalysis B: Environmental, Vol. 242, 01.03.2019, p. 499-506.

Research output: Contribution to journalArticle

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AU - Kuo, Ming Yu

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AU - Chiu, Yi Hsuan

AU - Lai, Ting Hsuan

AU - Fang, Mei Jing

AU - Wu, Jhen Yang

AU - Chen, Jhih Wei

AU - Wu, Chung-Lin

AU - Wei, Kung Hwa

AU - Lin, Hsin Chieh

AU - Hsu, Yung Jung

PY - 2019/3/1

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N2 - This work reports the synthesis of Au@Cu2O core@shell nanocrystals with controllable shell thicknesses and demonstrates their use as the dual-functional catalyst that can continuously operate under illumination and darkness conditions for efficient E. coli inactivation. On account of the peroxidase mimics of the Au core and Fenton reactivity of the Cu2O shell, the Au@Cu2O nanocrystals exhibit intrinsic peroxidase-like property with the reaction kinetics in accordance with the typical Michaelis–Menten mechanism. On the other hand, time-resolved photoluminescence spectra suggest the prevalence of pronounced charge separation for Au@Cu2O nanocrystals, an important advantage that is favourable for photocatalysis. By combining the photocatalytic capability with the peroxidase mimics features, Au@Cu2O nanocrystals can perform practical photocatalytic decomposition of E. coli under visible light illumination but still show vital activity towards E. coli inactivation after light illumination was turned off. The current study delivers a new catalyst configuration by exploiting the multiple functionalities of nanosized Au and Cu2O for advanced environmental and energy conversion applications.

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