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Research Article | Open Access

Balancing the piezoelectric coefficient and carrier concentration of Bi2WO6−x for ultrahigh piezocatalysis

Ying Wang1Xiaoli Xu1,2( )Lingbo Xiao3Lutao Li4,5Qiuhua Xu2,6Zhenhai Wen2,6Laishun Qin1( )Yanmin Jia7Dong-Liang Peng8Wanping Chen9Da Chen1( )
College of Materials and Chemistry, China Jiliang University, Hangzhou 310018, China
Key Laboratory of Jiangxi Province for Persistent Pollutants Control, National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
Department of Physics, Zhejiang University of Science and Technology, Hangzhou 310008, China
Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, China
Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy, Soochow University, Suzhou 215006, China
State Key Laboratory of Structural Chemistry, and Fujian Provincial Key Laboratory of Materials and Techniques toward Hydrogen Energy, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
School of Physics and Information Technology, Shaanxi Normal University, Xi’an 710121, China
State Key Laboratory of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, College of Materials, Xiamen University, Xiamen 361005, China
School of Physics and Technology, Wuhan University, Wuhan 430072, China
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Abstract

Balancing the piezoelectric coefficient and carrier concentration of materials is key in the field of piezocatalysis. In this work, Bi2WO6 material with both piezoelectric and semiconductor properties was chosen as a model material. A one-step ethylene glycol (EG)-assisted solvothermal method was used to synthesize Bi2WO6 with oxygen vacancies. By controlling the solvothermal time and temperature, the oxygen vacancy concentration (COV) was regulated. As COV increases, the piezoelectric coefficient decreases, the carrier concentration increases, and the hydrogen production rate first increases but then decreases. When COV reaches 1.45×1012 spins·mg−1, the corresponding piezoelectric coefficient and carrier concentration are 13.9 pm·V−1 and 2.90×1020 cm−3, respectively. The optimal hydrogen production rate per power of 2.21 μmol·g−1·h−1·W−1 is equivalent to or even better than that of most reported piezocatalysts. The piezoelectric coefficient and carrier concentration, as two factors, jointly determine the piezocatalytic performance. The findings of this research can provide important and deep-seated insights for better piezocatalysts in the future.

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Journal of Advanced Ceramics
Pages 1737-1747
Cite this article:
Wang Y, Xu X, Xiao L, et al. Balancing the piezoelectric coefficient and carrier concentration of Bi2WO6−x for ultrahigh piezocatalysis. Journal of Advanced Ceramics, 2024, 13(11): 1737-1747. https://doi.org/10.26599/JAC.2024.9220970

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Received: 15 June 2024
Revised: 22 August 2024
Accepted: 15 September 2024
Published: 20 November 2024
© The Author(s) 2024.

This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0, http://creativecommons.org/licenses/by/4.0/).

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