Journal
NANOSCALE
Volume 10, Issue 5, Pages 2380-2387Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nr07632k
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Funding
- National Natural Science Foundation of China [21671088, 21401091, 21431002, 21501080]
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Although substantial efforts have been made toward the synthesis of noble metal-semiconductor hetero-nanostructures, 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 O-2/H2O. Owing to the unique structural features, the resulting nanosheets show excellent photocatalytic activity and high stability toward water oxidation with an O-2 generation rate up to 3.48 mmol h (1) g (1) compared to those of the constituent materials under NIR light irradiation (lambda > 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.
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