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04 February 2020
Engineering crystal phase of polytypic CuInS2 nanosheets for enhanced photocatalytic and photoelectrochemical performance
Wenjiang Li1(
),
Zhihao Yuan1(
)
),
Zhihao Yuan1(
)
Topics:
Chromium compoundsCrystal structureCrystalsDefectsIndium compoundsLightLight absoptionNanocrystalline materials NanosheetsPhotocatalytic activity Photoelectrochemical cellsSubstratesSurface defectsTin oxidesZinc sulfide
Cite this article:
Li H, Li W, Li W, et al.
Engineering crystal phase of polytypic CuInS2 nanosheets for enhanced photocatalytic and photoelectrochemical performance.
Nano Research,
2020, 13(2): 583-590.
https://doi.org/10.1007/s12274-020-2665-4
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Crystal phase engineering on CuInS2 (CIS) nanocrystals, especially polytypic structure, has become one of the research hotspots to design the advanced materials and devices for energy conversion and environment treatment. Here, the polytypic CIS nanosheets (NSs) including zincblende/wurtzite and chalcopyrite/wurtzite types were first time achieved in a hot-injection system using oleic acid and liquid paraffin as the reaction media. As-obtained polytypic CIS NSs exhibit significantly enhanced light-absorption ability and visible-light-driven photocatalytic performance originating from the rational hetero-crystalline interfaces and surface defect states, which efficiently inhibit the recombination of photo-generated carriers. Meanwhile, the polytypic CIS NSs were spin-coated onto the surface of fluorinated-tin oxide glass substrate and used as the photoelectrode, which shows an excellent photoelectrochemical (PEC) activity in aqueous solution. The present work not only provides a facile, rapid, low-cost, and environmental-friendly synthesis strategy to design the crystal phase and defect structure of ternary chalcogenides, but also demonstrates the relationships between the polytypic structure and photocatalytic/photoelectrochemical properties.
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Engineering crystal phase of polytypic CuInS2 nanosheets for enhanced photocatalytic and photoelectrochemical performance
Wenjiang Li1(
), Zhihao Yuan1(
)
), Zhihao Yuan1(
)
Abstract
Crystal phase engineering on CuInS2 (CIS) nanocrystals, especially polytypic structure, has become one of the research hotspots to design the advanced materials and devices for energy conversion and environment treatment. Here, the polytypic CIS nanosheets (NSs) including zincblende/wurtzite and chalcopyrite/wurtzite types were first time achieved in a hot-injection system using oleic acid and liquid paraffin as the reaction media. As-obtained polytypic CIS NSs exhibit significantly enhanced light-absorption ability and visible-light-driven photocatalytic performance originating from the rational hetero-crystalline interfaces and surface defect states, which efficiently inhibit the recombination of photo-generated carriers. Meanwhile, the polytypic CIS NSs were spin-coated onto the surface of fluorinated-tin oxide glass substrate and used as the photoelectrode, which shows an excellent photoelectrochemical (PEC) activity in aqueous solution. The present work not only provides a facile, rapid, low-cost, and environmental-friendly synthesis strategy to design the crystal phase and defect structure of ternary chalcogenides, but also demonstrates the relationships between the polytypic structure and photocatalytic/photoelectrochemical properties.
Keywords:
defect, photocatalytic, CuInS2, hot injection, polytypic, photoelectrochemical activity
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Publication history
Copyright
Acknowledgements
Publication history
Received: 31 October 2019
Revised: 28 December 2019
Accepted: 18 January 2020
Published:
04 February 2020
Issue date: February 2020
Copyright
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Acknowledgements
This work was financially supported by the Joint Foundation of National Natural Science Foundation of China (No. U1764254), 321 Talent Project of Nanjing, China (No. 631783) and 111 Project, China (No. D17003).
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