@article{ZHANG2022, 
author = {Mingxin ZHANG and Kai LIU and Xingmin ZHANG and Bingbing WANG and Xinru XU and Xinxin DU and Chao YANG and Kewei ZHANG},
title = {Interfacial energy barrier tuning of hierarchical Bi2O3/WO3 heterojunctions for advanced triethylamine sensor},
year = {2022},
journal = {Journal of Advanced Ceramics},
volume = {11},
number = {12},
pages = {1860-1872},
keywords = {gas sensors, heterojunctions, hierarchical structures, Bi2O3/WO3, triethylamine (TEA)},
url = {https://www.sciopen.com/article/10.1007/s40145-022-0652-9},
doi = {10.1007/s40145-022-0652-9},
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.}
}