期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 595, 期 -, 页码 6-14出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.03.115
关键词
Ammonia sensor; MXene; Tungsten trioxide; Nanocomposite; Ultrasound compounding
资金
- Natural Science Foundation of China [61701053]
- Chongqing Research Program of Basic Research and Frontier Technology [cstc2018jcyjA3233]
- Fundamental Research Funds for the Central Universities [2018CDQYGD0008, 2019CDQYGD004, 2018CDXYGD0017]
- Chongqing Entrepreneurship and Innovation Supporting Program for Returned Overseas Students [cx2018059]
- National Students' Innovation and Entrepreneurship Training Program [201810611040]
A Ti3C2Tx/WO3 composite resistive sensor is developed with high sensitivity for NH3 detection at room temperature, showing a sensitivity 15.4 times higher than pure Ti3C2Tx sensor. The composite sensor exhibits excellent reproducibility, good long-term stability, and high selectivity to NH3, and the influence of relative humidity on NH3 gas sensing properties of the sensors is systematically studied.
Low-power consumption and high sensitivity are highly desirable for a vast range of NH3 sensing appli-cations. As a new type of two-dimension (2D) material, Ti3C2Tx is extensively studied for room temper-ature NH3 sensors recently. However, the Ti3C2Tx MXene based gas sensors suffer mainly from low sensitivity. Herein, we report a sensitive Ti3C2Tx/WO3 composite resistive sensor for NH3 detection. The Ti3C2Tx/WO3 composite consisting of WO3 nanoparticles anchored on Ti3C2Tx nanoflakes were syn-thesized successfully with a facile ultra-sonication technique. The composite sensor with optimized com-ponents exhibits a high sensitivity of 22.3% for 1 ppm NH3 at room temperature, which is 15.4 times higher than the pure Ti3C2Tx sensor. Furthermore, the composite sensor has excellent reproducibility, good long-term stability, and high selectivity to NH3. The relative humidity influence on NH3 gas sensing properties of the sensors was systematically studied. This research provides an efficient route for the preparation of novel MXene-based sensitive materials for high-performance NH3 sensors. (C) 2021 Elsevier Inc. All rights reserved.
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