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Efficient Ag@AgCl Cubic Cage Photocatalysts Profit from Ultrafast Plasmon-Induced Electron Transfer Processes

Authors

  • Yuxin Tang,

    1. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
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  • Zhelong Jiang,

    1. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
    2. C. N. Yang Scholars Programme, Nanyang Technological University, 60 Nanyang Drive, SBS-02n-45, Singapore 637551, Singapore
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  • Guichuan Xing,

    1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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  • Anran Li,

    1. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
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  • Pushkar D. Kanhere,

    1. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
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  • Yanyan Zhang,

    1. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
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  • Tze Chien Sum,

    Corresponding author
    1. C. N. Yang Scholars Programme, Nanyang Technological University, 60 Nanyang Drive, SBS-02n-45, Singapore 637551, Singapore
    • C. N. Yang Scholars Programme, Nanyang Technological University, 60 Nanyang Drive, SBS-02n-45, Singapore 637551, Singapore.
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  • Shuzhou Li,

    Corresponding author
    1. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
    • School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
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  • Xiaodong Chen,

    1. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
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  • Zhili Dong,

    Corresponding author
    1. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
    • School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
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  • Zhong Chen

    Corresponding author
    1. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
    • School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
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Abstract

Photon-coupling and electron dynamics are the key processes leading to the photocatalytic activity of plasmonic metal-semiconductor nanohybrids. To better utilize and explore these effects, a facile large-scale synthesis route to form Ag@AgCl cubic cages with well-defined hollow interiors is carried out using a water-soluble sacrificial salt-crystal-template process. Theoretical calculations and experimental probes of the electron transfer process are used in an effort to gain insight into the underlying plasmonic properties of the Ag@AgCl materials. Efficient utilization of solar energy to create electron-hole pairs is attributed to the significant light confinement and enhancement around the Ag/AgCl interfacial plasmon hot spots and multilight-reflection inside the cage structure. More importantly, an ultrafast electron transfer process (≤150 fs) from Ag nanoparticles to the AgCl surface is detected, which facilitates the charge separation efficiency in this system, contributing to high photocatalytic activity and stability of Ag@AgCl photocatalyst towards organic dye degradation.

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