期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 381, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2023.133412
关键词
Gas sensor; MXene; Stabilization; Metal oxides; Triethylamine; Environmental detection
In this study, a Cr2O3/TiO2/Ti3C2Tx gas-sensitive material was successfully synthesized, showing a unique rapid and selective response to Triethylamine. Furthermore, the sensor exhibited excellent chemical stability and maintained its morphology and gas sensing performance even after ageing at 500 degrees C for two months. This research demonstrates the validity of the proposed approach for an additional metal oxide and highlights the excellent practical application potential of the sensor in harsh environments.
MXene-based gas-sensitive nanocomposites are an area of high interest in developing high-performance gas sensors that operate at room temperature. Combining MXene with different nano-sized metal oxides is a strategy to improve sensing performance, but poor chemical stability, especially in humid environments, is the biggest obstacle to practical applications. Recently we demonstrated a method to prepare a ternary heterostructure gas sensor by decorating a stable TiO2/Ti3C2Tx composite with MoO3 which also provided selectivity. Here, we develop the proposed concept by synthesizing a Cr2O3/TiO2/Ti3C2Tx gas-sensitive material that shows a unique rapid and selective response to Triethylamine. In addition, the sensor offers excellent chemical stability and can maintain its morphology and gas sensing performance even after ageing at 500 degrees C for two months. This work demonstrates the validity of the proposed approach for an additional metal oxide and yields a sensor that exhibits potential for excellent practical application in harsh environment.
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