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Hollow AgI:Ag Nanoframes as Solar Photocatalysts for Hydrogen Generation from Water Reduction

Authors

  • Prof. Dr. Changhua An,

    Corresponding author
    1. State Key Laboratory of Heavy Oil, College of Chemical Engineering and College of Science, China University of Petroleum, Qingdao, 266580 (PR China), Fax: (+86) 532-8698-1787
    • Changhua An, State Key Laboratory of Heavy Oil, College of Chemical Engineering and College of Science, China University of Petroleum, Qingdao, 266580 (PR China), Fax: (+86) 532-8698-1787

      Yugang Sun, Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (USA), Fax: (+1) 630-252-4646

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  • Jizhuang Wang,

    1. State Key Laboratory of Heavy Oil, College of Chemical Engineering and College of Science, China University of Petroleum, Qingdao, 266580 (PR China), Fax: (+86) 532-8698-1787
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  • Junxue Liu,

    1. State Key Laboratory of Heavy Oil, College of Chemical Engineering and College of Science, China University of Petroleum, Qingdao, 266580 (PR China), Fax: (+86) 532-8698-1787
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  • Shutao Wang,

    1. State Key Laboratory of Heavy Oil, College of Chemical Engineering and College of Science, China University of Petroleum, Qingdao, 266580 (PR China), Fax: (+86) 532-8698-1787
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  • Dr. Yugang Sun

    Corresponding author
    1. Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (USA), Fax: (+1) 630-252-4646
    • Changhua An, State Key Laboratory of Heavy Oil, College of Chemical Engineering and College of Science, China University of Petroleum, Qingdao, 266580 (PR China), Fax: (+86) 532-8698-1787

      Yugang Sun, Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (USA), Fax: (+1) 630-252-4646

    Search for more papers by this author

Abstract

A facile strategy based on the principle of the Kirkendall effect has been developed to synthesize hollow nanoframes and nanoshells of AgI:Ag composites through the controlled anion-exchange reaction between I ions and solid AgBr:Ag (or AgCl:Ag) nanoparticles that serve as templates. Regardless of the morphologies of the template nanoparticles, they can be chemically transformed to hollow AgI:Ag structures with morphologies similar to those of the templates. The synthesized hollow AgI:Ag nanostructures can be used as efficient photocatalysts for H2 generation from water reduction and the decomposition of organic pollutants owing to the enhanced absorption of visible light by the Ag components in the hybrid nanostructures. The hollow nanostructures exhibit a higher photocatalytic performance than the corresponding solid nanoparticles possibly because of the large surface area and unique AgI/Ag interfaces associated with the hollow nanostructures.

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