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Construction of ZnO/CdS three-dimensional hierarchical photoelectrode for improved photoelectrochemical performance

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  • Xu, Shenming
  • Jiang, Jiangang
  • Ren, Wenyi
  • Wang, He
  • Zhang, Rui
  • Xie, Yingge
  • Chen, Yubin

Abstract

Three-dimensional ZnO/CdS hierarchical films with uniform CdS deposition on the ZnO nanorods surface is prepared by a two-step hydrothermal method. The morphology of CdS nanostructure can be adjusted from particles to sheets and then blocks by changing amount of the surfactant in the precursor solution. The ZnO/CdS hierarchical film as photoelectrode with optimized morphology shows significant enhancement to the light harvesting and photoelectrochemical performance. Under light irradiation of 100 mW/cm2, the three-dimensional ZnO/CdS hierarchical film yields a photocurrent density of 4.5 mA/cm2, approximately two times higher than that of film without three-dimensional structure. The photoelectrochemical property improvement is attributed to the (1) enhanced light absorption due to the multi-scattering and multi-reflection of the unique three-dimensional hierarchical structure, (2) improved photogenerated carrier separation and transportation because of the hierarchical and heterojunction structure, and (3) facilitated hole transfer and reaction at the photoelectrode-electrolyte interface due to the large surface area.

Suggested Citation

  • Xu, Shenming & Jiang, Jiangang & Ren, Wenyi & Wang, He & Zhang, Rui & Xie, Yingge & Chen, Yubin, 2020. "Construction of ZnO/CdS three-dimensional hierarchical photoelectrode for improved photoelectrochemical performance," Renewable Energy, Elsevier, vol. 153(C), pages 241-248.
    • Handle: RePEc:eee:renene:v:153:y:2020:i:c:p:241-248
    DOI: 10.1016/j.renene.2020.02.001
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    References listed on IDEAS

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    1. Ong, Chin Boon & Ng, Law Yong & Mohammad, Abdul Wahab, 2018. "A review of ZnO nanoparticles as solar photocatalysts: Synthesis, mechanisms and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 536-551.
    2. Maochang Liu & Dengwei Jing & Zhaohui Zhou & Liejin Guo, 2013. "Twin-induced one-dimensional homojunctions yield high quantum efficiency for solar hydrogen generation," Nature Communications, Nature, vol. 4(1), pages 1-8, October.
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    Cited by:

    1. Mojaddami, Majdoddin & Simchi, Abdolreza, 2020. "Robust water splitting on staggered gap heterojunctions based on WO3∖WS2–MoS2 nanostructures," Renewable Energy, Elsevier, vol. 162(C), pages 504-512.
    2. Kumar, Dheeraj & Sharma, Surbhi & Khare, Neeraj, 2021. "Piezo-phototronic and plasmonic effect coupled Ag-NaNbO3 nanocomposite for enhanced photocatalytic and photoelectrochemical water splitting activity," Renewable Energy, Elsevier, vol. 163(C), pages 1569-1579.
    3. Kumar, Dheeraj & Sharma, Surbhi & Khare, Neeraj, 2020. "Enhanced photoelectrochemical performance of plasmonic Ag nanoparticles grafted ternary Ag/PaNi/NaNbO3 nanocomposite photoanode for photoelectrochemical water splitting," Renewable Energy, Elsevier, vol. 156(C), pages 173-182.
    4. Nhan Nguyen, Thi Nghi & Chang, Kao-Shuo, 2022. "Piezoelectricity-enhanced multifunctional applications of hydrothermally-grown p-BiFeO3–n-ZnO heterojunction films," Renewable Energy, Elsevier, vol. 197(C), pages 89-100.

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