Embedding Ultrasmall Au Clusters into the Pores of a Covalent Organic Framework for Enhanced Photostability and Photocatalytic Performance

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  • Yang Deng
    Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 P. R. China
  • Zhen Zhang
    Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 P. R. China
  • Peiyao Du
    Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 P. R. China
  • Xingming Ning
    Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 P. R. China
  • Yue Wang
    Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 P. R. China
  • Dongxu Zhang
    Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 P. R. China
  • Jia Liu
    Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 P. R. China
  • Shouting Zhang
    Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 P. R. China
  • Xiaoquan Lu
    Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 P. R. China

抄録

<jats:title>Abstract</jats:title><jats:p>Gold clusters loaded on various supports have been widely used in the fields of energy and biology. However, the poor photostability of Au clusters on support interfaces under prolonged illumination usually results in loss of catalytic performance. Covalent organic frameworks (COFs) with periodic and ultrasmall pore structures are ideal supports for dispersing and stabilizing Au clusters, although it is difficult to encapsulate Au clusters in the ultrasmall pores. In this study, a two‐dimensional (2D) COF modified with thiol chains in its pores was prepared. With −SH groups as nucleation sites, Au nanoclusters (NCs) could grow in situ within the COF. The ultrasmall pores of the COF and the strong S−Au binding energy combine to improve the dispersibility of Au NCs under prolonged light illumination. Interestingly, Au–S–COF bridging as observed in this artificial Z‐scheme photocatalytic system is deemed to be an ideal means to increase charge‐separation efficiency.</jats:p>

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