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Photocatalytic Preparation of Encapsulated Gold Nanoparticles by Jingle-bell-shaped Cadmium Sulfide–silica Nanoparticles

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Gold (Au) nanoparticles were deposited inside silica: (SiO2) shells containing cadmium sulfide (CdS) nanoparticles through photocatalytic reduction of potassium dicyanogold(I) by CdS. Photocatalytic Au deposition occurred only when core-shell nanoparticles having a void space between the core and shell, i.e., a jingle-bell-shaped structure, were used. These core-shell nanoparticles were prepared by size-selective photoetching of SiO2 -covered CdS nanoparticles. The size of Au nanoparticles could be controlled by adjustment of the void space in SiO2-covered CdS. Dissolution of CdS by acid treatment from the Au-deposited jingle-bell nanoparticles did not have any effect on the surface-plasmon absorption by Au. These facts indicate that Au nanoparticles of adjustable size can be prepared in an SiO2 shell that prevents mutual coalescence of Au nanoparticles but allows permeation of molecules and ions.

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Authors and Affiliations

  1. “Light and Control”, PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho Kawaguchi, Saitama, Japan

    Bonamali Pal & Tsukasa Torimoto

  2. Catalysis Research Center, Hokkaido University, Sapporo, 001-0021, Japan

    Tsukasa Torimoto, Shigeru Ikeda & Bunsho Ohtani

  3. Graduate School of Engineering, Hokkaido University, Sapporo, 060-8628, Japan

    Tamaki Shibayama

  4. Center for Advanced Research of Energy Technology, Hokkaido University, Sapporo, 060-8628, Japan

    Kenji Sugawara & Heishichiro Takahashi

Authors
  1. Bonamali Pal
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  2. Tsukasa Torimoto
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  3. Shigeru Ikeda
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  4. Tamaki Shibayama
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  5. Kenji Sugawara
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  6. Heishichiro Takahashi
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  7. Bunsho Ohtani
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Correspondence to Bunsho Ohtani.

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Pal, B., Torimoto, T., Ikeda, S. et al. Photocatalytic Preparation of Encapsulated Gold Nanoparticles by Jingle-bell-shaped Cadmium Sulfide–silica Nanoparticles. Top Catal 35, 321–325 (2005). https://doi.org/10.1007/s11244-005-3840-2

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  • DOI: https://doi.org/10.1007/s11244-005-3840-2

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