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

Abstract Traditional triethylamine (TEA) sensors suffer from the drawback of serious cross-sensitivity due to low charge-transfer ability gas-sensing materials. Herein, an advanced anti-interference TEA sensor is designed by utilizing interfacial energy barriers hierarchical Bi 2 O 3 /WO composite. Benefiting abundant slit-like pores, desirable defect features, and amplification effect heterojunctions, based on composite with 40% (0.4-Bi ) demonstrates remarkable performance in terms faster response/recovery time (1.7-fold/1.2-fold), higher response (2.1-fold), lower power consumption (30 °C-decrement) as compared pristine WO sensor. Furthermore, exhibits long-term stability, reproducibility, negligible towards interfering molecules, indicating promising potential heterojunctions detection low-concentration real applications. This work not only offers a rational solution design gas tuning but also provides fundamental understanding structures field.