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Journal of Advanced Ceramics 2022, 11(12): 1860-1872 https://doi.org/10.1007/s40145-022-0652-9
Research Article | Open Access | Issue | Published: 17 November 2022

Interfacial energy barrier tuning of hierarchical Bi2O3/WO3 heterojunctions for advanced triethylamine sensor

Show Author's Information Mingxin ZHANG†,  Kai LIU†,  Xingmin ZHANG,  Bingbing WANG,  Xinru XU,  Xinxin DU,  Chao YANG,  Kewei ZHANG( )
College of Materials Science and Engineering, State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Qingdao University, Qingdao 266071, China

† Mingxin Zhang and Kai Liu contributed equally to this work.

Keywords:
gas sensors, heterojunctions, hierarchical structures, Bi2O3/WO3, triethylamine (TEA)
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ZHANG M, LIU K, ZHANG X, et al. Interfacial energy barrier tuning of hierarchical Bi2O3/WO3 heterojunctions for advanced triethylamine sensor. Journal of Advanced Ceramics, 2022, 11(12): 1860-1872. https://doi.org/10.1007/s40145-022-0652-9
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Abstract Full text Electronic supplementary material About this article

Traditional triethylamine (TEA) sensors suffer from the drawback of serious cross-sensitivity due to the low charge-transfer ability of gas-sensing materials. Herein, an advanced anti-interference TEA sensor is designed by utilizing interfacial energy barriers of hierarchical Bi2O3/WO3 composite. Benefiting from abundant slit-like pores, desirable defect features, and amplification effect of heterojunctions, the sensor based on Bi2O3/WO3 composite with 40% Bi2O3 (0.4-Bi2O3/WO3) demonstrates remarkable performance in terms of faster response/recovery time (1.7-fold/1.2-fold), higher response (2.1-fold), and lower power consumption (30 ℃-decrement) as compared with the pristine WO3 sensor. Furthermore, the composite sensor exhibits long-term stability, reproducibility, and negligible response towards interfering molecules, indicating the promising potential of Bi2O3/WO3 heterojunctions in anti-interference detection of low-concentration TEA in real applications. This work not only offers a rational solution to design advanced gas sensors by tuning the interfacial energy barriers of heterojunctions, but also provides a fundamental understanding of hierarchical Bi2O3 structures in the gas-sensing field.


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Abstract
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Electronic supplementary material
About this article

Interfacial energy barrier tuning of hierarchical Bi2O3/WO3 heterojunctions for advanced triethylamine sensor

Show Author's information Mingxin ZHANG†, Kai LIU†, Xingmin ZHANG, Bingbing WANG, Xinru XU, Xinxin DU, Chao YANG, Kewei ZHANG( )
College of Materials Science and Engineering, State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Qingdao University, Qingdao 266071, China

† Mingxin Zhang and Kai Liu contributed equally to this work.

Abstract

Traditional triethylamine (TEA) sensors suffer from the drawback of serious cross-sensitivity due to the low charge-transfer ability of gas-sensing materials. Herein, an advanced anti-interference TEA sensor is designed by utilizing interfacial energy barriers of hierarchical Bi2O3/WO3 composite. Benefiting from abundant slit-like pores, desirable defect features, and amplification effect of heterojunctions, the sensor based on Bi2O3/WO3 composite with 40% Bi2O3 (0.4-Bi2O3/WO3) demonstrates remarkable performance in terms of faster response/recovery time (1.7-fold/1.2-fold), higher response (2.1-fold), and lower power consumption (30 ℃-decrement) as compared with the pristine WO3 sensor. Furthermore, the composite sensor exhibits long-term stability, reproducibility, and negligible response towards interfering molecules, indicating the promising potential of Bi2O3/WO3 heterojunctions in anti-interference detection of low-concentration TEA in real applications. This work not only offers a rational solution to design advanced gas sensors by tuning the interfacial energy barriers of heterojunctions, but also provides a fundamental understanding of hierarchical Bi2O3 structures in the gas-sensing field.

Keywords: gas sensors, heterojunctions, hierarchical structures, Bi2O3/WO3, triethylamine (TEA)

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Publication history

Received: 27 April 2022
Revised: 13 July 2022
Accepted: 19 August 2022
Published: 17 November 2022
Issue date: December 2022

Copyright

© The Author(s) 2022.

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51973099), Taishan Scholar Program of Shandong Province (No. tsqn201812055), Qingdao Science and Technology Plan Key Research and Development Special Project (No. 21-1-2-17-xx), and State Key Laboratory of Bio-Fibers and Eco-Textiles (Qingdao University) (Nos. ZKT04 and GZRC202007).

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