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Monolayer HNb3O8 for Selective Photocatalytic Oxidation of Benzylic Alcohols with Visible Light Response

Authors

  • Dr. Shijing Liang,

    1. State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002 (P.R. China)
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  • Linrui Wen,

    1. State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002 (P.R. China)
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  • Dr. Sen Lin,

    1. State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002 (P.R. China)
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  • Dr. Jinhong Bi,

    1. State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002 (P.R. China)
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  • Prof. Pingyun Feng,

    Corresponding author
    1. Department of Chemistry, University of California, Riverside, CA 92521 (USA)
    • Pingyun Feng, Department of Chemistry, University of California, Riverside, CA 92521 (USA)

      Ling Wu, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002 (P.R. China)

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  • Prof. Xianzhi Fu,

    1. State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002 (P.R. China)
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  • Prof. Ling Wu

    Corresponding author
    1. State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002 (P.R. China)
    2. Department of Chemistry, University of California, Riverside, CA 92521 (USA)
    • Pingyun Feng, Department of Chemistry, University of California, Riverside, CA 92521 (USA)

      Ling Wu, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002 (P.R. China)

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  • This work was supported by the National Natural Science Foundation of China (21303019, 21177024, 21203026, 21003022, and 21273036), National Science Foundation (CHE-1213795, P.F.), Natural Science Foundation of Fujian Province (2011J01041), and National Key Basic Research Program of China (973 Program: 2014CB239303).

Abstract

Monolayer HNb3O8 2D nanosheets have been used as highly chemoselective and active photocatalysts for the selective oxidation of alcohols. The nanosheets exhibit improved photocatalytic activity over their layered counterparts. Results of in situ FTIR, DRS, ESR, and DFT calculations show the formation of surface complexes between the Lewis acid sites on HNb3O8 2D nanosheets and alcohols. These complexes play a key role in the photocatalytic activity of the material. Furthermore, the unique structural features of the nanosheets contributed to their high photocatalytic activity. An electron transition from the coordinated alcohol species to surface Nb atoms takes place and initiates the aerobic oxidation of alcohols with high product selectivity under visible light irradiation. This reaction process is distinct from that of classic semiconductor photocatalysis.

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