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A hierarchical heterostructure of CdS QDs confined on 3D ZnIn2S4 with boosted charge transfer for photocatalytic CO2 reduction

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Abstract

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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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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  1. Zezhou Zhu and Xiaoxia Li contributed equally to this work.

Authors and Affiliations

  1. School of Nano-Tech and Nano-Bionics, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230026, China

    Zezhou Zhu, Yunteng Qu, Fangyao Zhou, Zhiyuan Wang, Wenyu Wang, Changming Zhao, Liqiang Li & Yuen Wu

  2. Hefei National Laboratory for Physical Sciences at the Microscale, Synergetic Innovation Center of Quantum Information and Quantum Physics, Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, China

    Xiaoxia Li & Qun Zhang

  3. Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, China

    Zezhou Zhu, Liqiang Li & Yagang Yao

  4. Center for Micro and Nanoscale Research and Fabrication, University of Science and Technology of China, Hefei, 230026, China

    Huijuan Wang

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  1. Zezhou Zhu
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Correspondence to Yagang Yao, Qun Zhang or Yuen Wu.

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A hierarchical heterostructure of CdS QDs confined on 3D ZnIn2S4 with boosted charge transfer for photocatalytic CO2 reduction

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Zhu, Z., Li, X., Qu, Y. et al. A hierarchical heterostructure of CdS QDs confined on 3D ZnIn2S4 with boosted charge transfer for photocatalytic CO2 reduction. Nano Res. 14, 81–90 (2021). https://doi.org/10.1007/s12274-020-3045-9

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