三甲胺
材料科学
异质结
静电纺丝
纳米纤维
X射线光电子能谱
氧化物
二硫化钼
复合数
检出限
化学工程
纳米技术
复合材料
光电子学
化学
聚合物
有机化学
色谱法
冶金
工程类
作者
Shaowei Ma,Jingyu Guo,Hao Zhang,Xingyan Shao,Dongzhi Zhang
出处
期刊:Nanomaterials
[MDPI AG]
日期:2024-03-18
卷期号:14 (6): 537-537
被引量:1
摘要
The combination of two-dimensional material MXene and one-dimensional metal oxide semiconductor can improve the carrier transmission rate, which can effectively improve sensing performance. We prepared a trimethylamine gas sensor based on MoO3 nanofibers and layered Ti3C2Tx MXene. Using electrospinning and chemical etching methods, one-dimensional MoO3 nanofibers and two-dimensional Ti3C2Tx MXene nanosheets were prepared, respectively, and the composites were characterized via XPS, SEM, and TEM. The Ti3C2Tx MXene-MoO3 composite material exhibits excellent room-temperature response characteristics to trimethylamine gas, showing high response (up to four for 2 ppm trimethylamine gas) and rapid response-recovery time (10 s/7 s). Further, we have studied the possible sensitivity mechanism of the sensor. The Ti3C2Tx MXene-MoO3 composite material has a larger specific surface area and more abundant active sites, combined with p-n heterojunction, which effectively improves the sensitivity of the sensor. Because of its low detection limit and high stability, it has the potential to be applied in the detection system of trimethylamine as a biomarker in exhaled air.
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