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Research Article | Open Access

Enhanced piezo-catalysis in ZnO rods with built-in nanopores

Ting Lia,b,†, Wenjin Hua,†, Changxin Tanga, Zihao Zhoua, Zhiguo Wanga, Longlong Shua( )
School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
School of Physics and Electronic Information, Nanchang Normal University, Nanchang 330032, China

† Ting Li and Wenjin Hu contributed equally to this work.

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Graphical Abstract

Abstract

Strategies to improve the efficiency of piezoelectric catalysis have long focused on piezo-optical coupling and construction of heterojunctions. However, it is a challenge to reinforce the performance of piezoelectric catalysis in a single material. Herein the built-in nanopores in single-crystal ZnO rods are employed to form stress to intensify piezo-catalytic efficiency. The piezo-catalytic efficiency of the ZnO rods with built-in nanopores (holey ZnO NRs) for degrading dyes was about 1.7 times that of the ZnO rods without built-in nanopores (ZnO NRs). X-ray diffraction and Raman peaks of holey ZnO NRs appeared blue-shifted in comparison to ZnO NRs, uncovering the existence of tensile stress in holey ZnO NRs. The piezoelectric coefficient d33 of holey ZnO NRs increased by 1.92 times, triggering the amplification of piezoelectric catalytic property. Additionally, the piezoelectric current, carrier lifetime, and diffusion length of holey ZnO NRs were larger than that of ZnO NRs, respectively. These factors all contribute to the enhanced piezoelectric catalytic efficiency of holey ZnO NRs. This work demonstrates that the method of induced stress with built-in nanopores is a promising strategy for improving the piezoelectric catalytic efficiency of single-crystal ZnO rods.

Keywords

piezoelectric potentialpiezo catalysisbuilt-in nanoporeszinc oxide rods

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Journal of Advanced Ceramics
Volume 12 Issue 12,
December 2023
Pages 2271-2283
DOI: 10.26599/JAC.2023.9220819
Cite this article:
Li T, Hu W, Tang C, et al. Enhanced piezo-catalysis in ZnO rods with built-in nanopores. Journal of Advanced Ceramics, 2023, 12(12): 2271-2283. https://doi.org/10.26599/JAC.2023.9220819

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Received: 27 July 2023
Revised: 18 September 2023
Accepted: 12 October 2023
Published: 27 December 2023
© The Author(s) 2023.

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