High-efficiency photoelectrochemical electrodes based on ZnIn2S4 sensitized ZnO nanotube arrays

Jianhua Han; Zhifeng Liu; Keying Guo; Bo Wang; Xueqi Zhang; Tiantian Hong

doi:10.1016/j.apcatb.2014.07.040

High-efficiency photoelectrochemical electrodes based on ZnIn₂S₄ sensitized ZnO nanotube arrays

Jianhua Han, Zhifeng Liu^*, Keying Guo, Bo Wang, Xueqi Zhang, Tiantian Hong

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

123 Scopus citations

Abstract

Well aligned ZnO nanorods (NRs) and nanotubes (NTs) based core/shell nanoarrays were fabricated by hydrothermal chemical conversion and directional chemical etching method and used as photoelectrochemical (PEC) electrodes. The experimental results reveal that the optimum structure is the ZnO/ZnS/ZnIn₂S₄ NT arrays, such a novel PEC electrode has attained a hydrogen generation efficiency of 8.86%. This better result is attributed to the enhanced absorption efficiency, appropriate gradient energy gap structure and fast electron transfer rate of one-dimensional (1D) NT, which implies a promising application in PEC water splitting. In this paper, we also focus our study on the correlation between the properties of PEC electrode and the nanoarrays structure (including nanorods and nanotubes, binary and ternary sensitizer, buffer layer), and the formation mechanism of NT based on chemical etching process. By adjusting the amount of reactants and reaction time, the core/shell nanostructure can be tuned from NR to NT and formed buffer layer.

Original language	English
Pages (from-to)	179-188
Number of pages	10
Journal	Applied Catalysis B: Environmental
Volume	163
DOIs	https://doi.org/10.1016/j.apcatb.2014.07.040
State	Published - Feb 2015
Externally published	Yes

Keywords

Nanotubes
Photoelectrochemical
Water splitting
ZnO

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This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.apcatb.2014.07.040

Cite this

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title = "High-efficiency photoelectrochemical electrodes based on ZnIn2S4 sensitized ZnO nanotube arrays",

abstract = "Well aligned ZnO nanorods (NRs) and nanotubes (NTs) based core/shell nanoarrays were fabricated by hydrothermal chemical conversion and directional chemical etching method and used as photoelectrochemical (PEC) electrodes. The experimental results reveal that the optimum structure is the ZnO/ZnS/ZnIn2S4 NT arrays, such a novel PEC electrode has attained a hydrogen generation efficiency of 8.86%. This better result is attributed to the enhanced absorption efficiency, appropriate gradient energy gap structure and fast electron transfer rate of one-dimensional (1D) NT, which implies a promising application in PEC water splitting. In this paper, we also focus our study on the correlation between the properties of PEC electrode and the nanoarrays structure (including nanorods and nanotubes, binary and ternary sensitizer, buffer layer), and the formation mechanism of NT based on chemical etching process. By adjusting the amount of reactants and reaction time, the core/shell nanostructure can be tuned from NR to NT and formed buffer layer.",

keywords = "Nanotubes, Photoelectrochemical, Water splitting, ZnO",

author = "Jianhua Han and Zhifeng Liu and Keying Guo and Bo Wang and Xueqi Zhang and Tiantian Hong",

note = "Funding Information: The authors gratefully acknowledge the financial support from National Nature Science Foundation of China (no. 51102174 ).",

year = "2015",

month = feb,

doi = "10.1016/j.apcatb.2014.07.040",

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journal = "Applied Catalysis B: Environmental",

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T1 - High-efficiency photoelectrochemical electrodes based on ZnIn2S4 sensitized ZnO nanotube arrays

AU - Han, Jianhua

AU - Liu, Zhifeng

AU - Guo, Keying

AU - Wang, Bo

AU - Zhang, Xueqi

AU - Hong, Tiantian

N1 - Funding Information: The authors gratefully acknowledge the financial support from National Nature Science Foundation of China (no. 51102174 ).

PY - 2015/2

Y1 - 2015/2

N2 - Well aligned ZnO nanorods (NRs) and nanotubes (NTs) based core/shell nanoarrays were fabricated by hydrothermal chemical conversion and directional chemical etching method and used as photoelectrochemical (PEC) electrodes. The experimental results reveal that the optimum structure is the ZnO/ZnS/ZnIn2S4 NT arrays, such a novel PEC electrode has attained a hydrogen generation efficiency of 8.86%. This better result is attributed to the enhanced absorption efficiency, appropriate gradient energy gap structure and fast electron transfer rate of one-dimensional (1D) NT, which implies a promising application in PEC water splitting. In this paper, we also focus our study on the correlation between the properties of PEC electrode and the nanoarrays structure (including nanorods and nanotubes, binary and ternary sensitizer, buffer layer), and the formation mechanism of NT based on chemical etching process. By adjusting the amount of reactants and reaction time, the core/shell nanostructure can be tuned from NR to NT and formed buffer layer.

AB - Well aligned ZnO nanorods (NRs) and nanotubes (NTs) based core/shell nanoarrays were fabricated by hydrothermal chemical conversion and directional chemical etching method and used as photoelectrochemical (PEC) electrodes. The experimental results reveal that the optimum structure is the ZnO/ZnS/ZnIn2S4 NT arrays, such a novel PEC electrode has attained a hydrogen generation efficiency of 8.86%. This better result is attributed to the enhanced absorption efficiency, appropriate gradient energy gap structure and fast electron transfer rate of one-dimensional (1D) NT, which implies a promising application in PEC water splitting. In this paper, we also focus our study on the correlation between the properties of PEC electrode and the nanoarrays structure (including nanorods and nanotubes, binary and ternary sensitizer, buffer layer), and the formation mechanism of NT based on chemical etching process. By adjusting the amount of reactants and reaction time, the core/shell nanostructure can be tuned from NR to NT and formed buffer layer.

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