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Metal sulfide based materials as photocatalysts for energy conversion are essential to produce value-added chemical fuels, but their intrinsically slow carrier dynamics and low activity are yet to be resolved. Herein, we developed a unique heterogeneously nanostructured ZnIn2S4-CdS heterostructure that involves zero-dimensional (0D) CdS quantum dots uniformly confined on three-dimensional (3D) ZnIn2S4 nanoflowers, which achieves an excellent catalytic performance of CO2 photoconversion under visible-light irradiation. The obtained hierarchical heterostructure can significantly enhance the light harvesting, shorten the migration distance of carriers, and obviously accelerate the transport of electrons. As evidenced by the ultrafast transient absorption spectroscopy, the formed interface can effectively facilitate charge separation and transport. This work opens up a new avenue to carefully design the elaborate heterostructures for achieving optimal charge separation efficiency by lowering interfacial kinetic barriers and energy losses at the interface.

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Publication history

Received: 09 July 2020
Revised: 03 August 2020
Accepted: 07 August 2020
Published: 05 January 2021
Issue date: January 2021

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature

Acknowledgements

We acknowledge the financial support from the National Natural Science Foundation of China (Nos. 21573211, 21633007, 21671180), the National Key R&D Program of China (Nos. 2016YFA0200602, 2017YFA0208300, 2017YFA0700104, and 2018YFA0208702), and the Anhui Initiative in Quantum Information Technologies (No. AHY090200). We also thank the funding support from the CAS Fujian Institute of Innovation.

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Reprints and Permission requests may be sought directly from editorial office.
Email: nanores@tup.tsinghua.edu.cn

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