Defect-Engineered BiOBr/MoO <sub>3</sub> Heterostructure with Oxygen Vacancies for High-Selectivity Triethylamine Detection
Heterostructure construction and oxygen vacancy regulation can improve the electrical properties of metal-oxide semiconductors (MOSs), leading to an improved gas-sensing performance. Therefore, a series of BiOBr/MoO3 heterojunction composites were synthesized via a two-step fabrication strategy combining hydrothermal and chemical precipitation routes. It was found that BiOBr/MoO3 exhibits excellent gas-sensing properties for triethylamine (TEA), compared with pure MoO3 and BiOBr. The sample BBM-3, synthesized with a BiOBr/MoO3 molar ratio of 0.15, exhibits a high response (Ra/Rg = 311) toward 50 ppm of TEA at an operating temperature of 175 °C, as well as excellent selectivity and stability. A detailed discussion regarding the enhanced gas-sensing mechanism is provided due to the enhanced carrier transport properties caused by heterojunctions and oxygen vacancies. This study sheds new light on regulating the carrier transport properties of MOS-based materials, which is beneficial for the development of new gas-sensitive materials.
Authors
- Guangzhi Zhou (ORCID: https://orcid.org/0000-0002-6459-4907)
- Yang Zou (ORCID: https://orcid.org/0000-0003-1052-5014)
- Yanlin Zhong
- 陆国彪
- Dankui Liao (ORCID: https://orcid.org/0000-0001-8258-6161)
- Lixia Sun (ORCID: https://orcid.org/0000-0003-4912-3813)
- Jianhua Sun (ORCID: https://orcid.org/0000-0001-9968-2846)
- Weilian Yang
- Yue Yang
Institutions
- Guangxi University (CN)
- Green Chemistry (PL)
Publication Details
- Journal
- Industrial & Engineering Chemistry Research
- Published
- 2026-04-16
- DOI
- https://doi.org/10.1021/acs.iecr.5c05432
- Primary Topic
- Gas Sensing Nanomaterials and Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Natural Science Foundation of Guangxi Zhuang Autonomous Region
- National Natural Science Foundation of China
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University