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Conductometric Cr2O3/TiO2/Ti3C2Tx gas sensor for detecting triethylamine at room temperature

Yao, Y ; Sharif University of Technology | 2023

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  1. Type of Document: Article
  2. DOI: 10.1016/j.snb.2023.133412
  3. Publisher: Elsevier B.V , 2023
  4. Abstract:
  5. 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 °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. © 2023 Elsevier B.V
  6. Keywords:
  7. Environmental detection ; Gas sensor ; Metal oxides ; MXene ; Stabilization ; Triethylamine
  8. Source: Sensors and Actuators B: Chemical ; Volume 381 , 2023 ; 09254005 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0925400523001272