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

Paper ID Volume ID Publish Year Pages File Format Full-Text
44869 46375 2015 10 PDF Available
Title
High-efficiency photoelectrochemical electrodes based on ZnIn2S4 sensitized ZnO nanotube arrays
Abstract

•Directional chemical etching to fabricate ZnO-based core/shell nanotubes arrays.•A novel PEC electrode has attained a hydrogen generation efficiency of 8.86%.•Correlation between the properties of PEC electrode and the nanoarrays structure.

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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Keywords
ZnO; ZnIn2S4; Nanotubes; Photoelectrochemical; Water splitting
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High-efficiency photoelectrochemical electrodes based on ZnIn2S4 sensitized ZnO nanotube arrays
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 163, February 2015, Pages 179–188
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us