High Sensitivity Bi2O3/Ti3C2Tx Ammonia Sensor Based on Improved Synthetic MXene Method at Room Temperature

The MXene Ti3C2Tx was synthesized using hydrofluoric acid and an improved multilayer method in this study. Subsequently, a Bi2O3/Ti3C2Tx composite material was produced through hydrothermal synthesis. This composite boasts a unique layered structure, offering a large surface area that provides numer...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2024-10, Vol.24 (20), p.6514
Main Authors: Zhou, Baocang, Zhao, Zhihua, Lv, Zhenli, Chen, Zhuo, Kang, Sibo
Format: Article
Language:English
Subjects:
Acids
Ammonia
ammonia sensor
Bi2O3
Composite materials
gas sensors
Gases
Metal oxides
MXene
Nanocomposites
Nitrates
Radiation
Sensors
Temperature
Ti3C2Tx
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Summary:The MXene Ti3C2Tx was synthesized using hydrofluoric acid and an improved multilayer method in this study. Subsequently, a Bi2O3/Ti3C2Tx composite material was produced through hydrothermal synthesis. This composite boasts a unique layered structure, offering a large surface area that provides numerous contact and reaction sites, facilitating the adsorption of ammonia on its surface. The prepared Bi2O3/Ti3C2Tx-based sensor exhibits excellent sensing performance for ammonia gas, including high responsiveness, good repeatability, and rapid response–recovery time. The sensor’s response to 100 ppm ammonia gas is 61%, which is 11.3 times and 1.6 times the response values of the Ti3C2Tx gas sensor and Bi2O3 gas sensor, with response/recovery times of 61 s/164 s at room temperature, respectively. Additionally, the gas sensitivity mechanism of the Bi2O3/Ti3C2Tx-based sensor was analyzed, and the gas sensing response mechanism was proposed. This study shows that the sensor can effectively enhance the accuracy and precision of ammonia detection at room temperature and has a wide range of application scenarios.
ISSN:1424-8220
1424-8220
DOI:10.3390/s24206514