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Research Article

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

Zezhou Zhu1,3,§, Xiaoxia Li2,§, Yunteng Qu1, Fangyao Zhou1, Zhiyuan Wang1, Wenyu Wang1, Changming Zhao1, Huijuan Wang4, Liqiang Li1,3, Yagang Yao3( ), Qun Zhang2( ), Yuen Wu1( )
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
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
Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, China
Center for Micro and Nanoscale Research and Fabrication, University of Science and Technology of China, Hefei 230026, China

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

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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.

Keywords

photocatalysisCO2 reductioncharge transferhierarchical heterostructure

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Nano Research
Volume 14 Issue 1,
January 2021
Pages 81-90
DOI: 10.1007/s12274-020-3045-9
Cite this article:
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 Research, 2021, 14(1): 81-90. https://doi.org/10.1007/s12274-020-3045-9
Topics:
Cadmium sulfideCarbon dioxideCharge transferIIIndium compoundsLightPhotocatalystsSemiconductor quantum dotsSulfur compoundsVI semiconductorsZinc compounds

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Received: 09 July 2020
Revised: 03 August 2020
Accepted: 07 August 2020
Published: 05 January 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature
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