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 journalArticlepeer-review

34 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)499-506
Number of pages8
JournalApplied Catalysis B: Environmental
Volume242
DOIs
Publication statusPublished - 2019 Mar

All Science Journal Classification (ASJC) codes

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

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