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Flower-like Au/Ag/TiO2 nanocomposites with enhanced photocatalytic efficiency under visible light irradiation

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Abstract

Uniform flower-like TiO2 coated Au nanostars and core-shell Au@Ag nanostars with different amounts of Ag coating were prepared through a facile method by hydrolysis of TiF4 under an acidic environment. The photocatalytic capability of these flower-like nanocomposites under visible light irradiation was found to be enhanced by up to 4.7-fold compared to commercial P25 TiO2 nanoparticles. The enhanced photocatalytic activity was ascribed to improved light absorption and hot electron injection from the photo-excited Au@Ag core to the TiO2 shell.

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Acknowledgments

This work was supported by theMinistry of Education of Singapore (R-143-000-607-112), and the National Natural Science Foundation of China (21673155).

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Authors and Affiliations

  1. Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore

    Fei Han, Xin Mao & Qing-Hua Xu

  2. National University of Singapore Nanoscience & Nanotechnology Initiative (NUSNNI)-Nanocore, Singapore, 117576, Singapore

    Fei Han & Qing-Hua Xu

  3. National University of Singapore (Suzhou) Research Institute, Suzhou, 215123, China

    Qing-Hua Xu

Authors
  1. Fei Han
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  2. Xin Mao
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  3. Qing-Hua Xu
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Correspondence to Qing-Hua Xu.

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Han, F., Mao, X. & Xu, QH. Flower-like Au/Ag/TiO2 nanocomposites with enhanced photocatalytic efficiency under visible light irradiation. Sci. China Chem. 60, 521–527 (2017). https://doi.org/10.1007/s11426-016-9027-6

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  • DOI: https://doi.org/10.1007/s11426-016-9027-6

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