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Metal-semiconductor ternary hybrids for efficient visible-light photocatalytic hydrogen evolution

Abstract

Solar-driven production of chemical fuels through photocatalysis holds great promise for addressing ever-increasing energy and environment issues. However, its practical application is limited due to low light harvesting efficiency, fast charge recombination, and low stability of current photocatalysts. Here, we introduce a high-performance solar energy conversion platform constructed from the intimate coupling of two different complementary semiconductors (MoS2 and CdS) and morphology-controlled plasmonic metal nanocrystals (concave cubic Au nanocrystals) in a controlled manner. The sequential Au nanocrystal anchoring and CdS growth on two-dimensional exfoliated MoS2 nanosheets successfully yielded intimately coupled plasmonic metal-semiconductor ternary hybrids. The prepared hybrid photocatalysts exhibited superb hydrogen evolution capability under visible-light irradiation, which can be attributed to the synergistic integration of the advantages of semiconductor-semiconductor coupling, such as the broadening of light absorption and the retardation of charge recombination, and the plasmon energy transfer from Au nanocrystals to semiconductors via the hot electron transfer mechanism.

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Publication details

The article was received on 16 Apr 2018, accepted on 05 Jun 2018 and first published on 06 Jun 2018


Article type: Paper
DOI: 10.1039/C8TA03462A
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Metal-semiconductor ternary hybrids for efficient visible-light photocatalytic hydrogen evolution

    D. H. Wi, S. Y. Park, S. Lee, J. Sung, J. W. Hong and S. W. H. Han, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA03462A

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