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Research Article

Unique hollow heterostructured CdS/Cd0.5Zn0.5S-Mo1−xWxS2: Highly-improved visible-light-driven H2 generation via synergy of Cd0.5Zn0.5S protective shell and defect-rich Mo1−xWxS2 cocatalyst

Wenjing Wang1, Hanchu Chen1,3, Jiakun Wu1, Hui Wang3, Shaoxiang Li2, Bo Wang4, Yanyan Li1, Haifeng Lin1,5( ), Lei Wang1,2( )
Key Laboratory of Eco-chemical Engineering Key Laboratory of Optic-electric Sensing and Analytical Chemistry of Life Science Shandong Provincial Key Laboratory of Olefin Catalysis and PolymerizationTaishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology Qingdao 266042 China
Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection College of Environment and Safety Engineering Qingdao University of Science and Technology Qingdao 266042 China
Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization Key Laboratory of Rubber-Plastics of Ministry of Education School of Polymer Science and EngineeringQingdao University of Science and Technology Qingdao 266042 China
School of Applied Physics and Materials Wuyi University Jiangmen 529020 China
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 China
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Abstract

Photocatalytic water splitting for hydrogen (H2) production is a green sustainable technology, in which highly-efficient steady photocatalysts are fundamentally required. In this work, unique CdS/Cd0.5Zn0.5S-Mo1−xWxS2 photocatalyst constructed by CdS hollow nano-spheres with successively surface-modified Cd0.5Zn0.5S shell and defect-rich Mo1−xWxS2 ultrathin nanosheets was reported for the first time. Interestingly, the Cd0.5Zn0.5S shell could greatly enhance the photo-stability and reduce the carrier recombination of CdS. Meanwhile, enriching active sites and accelerating charge transfer could be achieved via anchoring defect-rich Mo1−xWxS2 onto CdS/Cd0.5Zn0.5S hollow heterostructures. Specifically, the optimized CdS/Cd0.5Zn0.5S-Mo1−xWxS2 (6 h Cd0.5Zn0.5S-coating, 7 wt.% Mo1−xWxS2, x = 0.5) hybrid delivered an exceptional H2 generation rate of 215.99 mmol·g−1·h−1, which is approximately 502, 134, and 23 times that of pure CdS, CdS/Cd0.5Zn0.5S, and 3 wt.% Pt-loaded CdS/Cd0.5Zn0.5S, respectively. Remarkably, a high H2 evolution reaction (HER) apparent quantum yield (AQY) of 64.81% was obtained under 420-nm irradiation. In addition, the CdS/Cd0.5Zn0.5S-Mo1−xWxS2 was also durable for H2 production under long-term irradiation. This work provides valuable inspirations to rational design and synthesis of efficient and stable hybrid photocatalysts for solar energy conversion.

Keywords

CdS hollow nano-spheresCd0.5Zn0.5S protective shellsdefect-rich Mo1−xWxS2 nanosheetscocatalystsphotocatalytic H2 evolution

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Nano Research
Volume 15 Issue 2,
February 2022
Pages 985-995
DOI: 10.1007/s12274-021-3585-7
Cite this article:
Wang W, Chen H, Wu J, et al. Unique hollow heterostructured CdS/Cd0.5Zn0.5S-Mo1−xWxS2: Highly-improved visible-light-driven H2 generation via synergy of Cd0.5Zn0.5S protective shell and defect-rich Mo1−xWxS2 cocatalyst. Nano Research, 2022, 15(2): 985-995. https://doi.org/10.1007/s12274-021-3585-7
Topics:
Hydrogen production

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Received: 18 January 2021
Revised: 08 May 2021
Accepted: 12 May 2021
Published: 08 July 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021
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