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Research Article | Open Access

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

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.

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Graphical Abstract

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

Bi2O3/WO3heterojunctionshierarchical structurestriethylamine (TEA)gas sensors

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Journal of Advanced Ceramics
Volume 11 Issue 12,
December 2022
Pages 1860-1872
DOI: 10.1007/s40145-022-0652-9
Cite this article:
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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Received: 27 April 2022
Revised: 13 July 2022
Accepted: 19 August 2022
Published: 17 November 2022
© The Author(s) 2022.

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