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Issue 5, 2018
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Constructing two-dimensional CuFeSe2@Au heterostructured nanosheets with an amorphous core and a crystalline shell for enhanced near-infrared light water oxidation

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Abstract

Although substantial efforts have been made toward the synthesis of noble metal–semiconductor heteronanostructures, direct in situ synthesis of two-dimensional (2D) core–shell semiconductor@noble metal heterostructured nanosheets remains largely unexplored. Herein, we report the synthesis of a novel 2D core–shell CuFeSe2@Au heterostructured nanosheet with an amorphous core and a crystalline shell based on the reversed growth of Au nanosheets on the CuFeSe2 frameworks under near-infrared (NIR) illumination. The nanosheet exhibits strong absorbance in the NIR region, and the valence band top of CuFeSe2@Au nanosheets is higher than the oxidation potential of O2/H2O. Owing to the unique structural features, the resulting nanosheets show excellent photocatalytic activity and high stability toward water oxidation with an O2 generation rate up to 3.48 mmol h−1 g−1 compared to those of the constituent materials under NIR light irradiation (λ > 850 nm). This work brings new opportunities to prepare 2D core–shell semiconductor@noble metal heterostructured nanosheets, which can be applied as photocatalysts toward water splitting and solar energy conversion at long wavelengths.

Graphical abstract: Constructing two-dimensional CuFeSe2@Au heterostructured nanosheets with an amorphous core and a crystalline shell for enhanced near-infrared light water oxidation

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Publication details

The article was received on 13 Oct 2017, accepted on 18 Dec 2017 and first published on 18 Dec 2017


Article type: Paper
DOI: 10.1039/C7NR07632K
Citation: Nanoscale, 2018,10, 2380-2387
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    Constructing two-dimensional CuFeSe2@Au heterostructured nanosheets with an amorphous core and a crystalline shell for enhanced near-infrared light water oxidation

    H. Wen, H. Li, S. He, F. Chen, E. Ding, S. Liu, B. Wang and Y. Peng, Nanoscale, 2018, 10, 2380
    DOI: 10.1039/C7NR07632K

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