Ultra-high performance humidity sensor enabled by a self-assembled CuO/Ti3C2TX MXene

An ultra-high performance humidity sensor based on a CuO/Ti3C2TX MXene has been investigated in this work. The moisture-sensitive material was fabricated by a self-assembly method. The morphology and nanostructure of the fabricated CuO/Ti3C2TX composites were characterized by scanning electron micro...

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Bibliographic Details
Published in:RSC advances 2023-02, Vol.13 (9), p.6264-6273
Main Authors: Wang, Lei, Yao, Xinqi, Yuan, Shuaishuai, Gao, Yang, Zhang, Ruhang, Yu, Xinhai, Shan-Tung Tu, Chen, Shijian
Format: Article
Language:English
Subjects:
Chemistry
Electron microscopy
Moisture effects
MXenes
Photoelectrons
Recovery time
Relative humidity
Response time
Self-assembly
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Summary:An ultra-high performance humidity sensor based on a CuO/Ti3C2TX MXene has been investigated in this work. The moisture-sensitive material was fabricated by a self-assembly method. The morphology and nanostructure of the fabricated CuO/Ti3C2TX composites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectra. The humidity sensing abilities of the CuO/Ti3C2TX sensor in the relative humidity (RH) range from 0% to 97% were studied. The results showed that the humidity sensor had a high sensitivity of 451 kΩ/% RH, short response time (0.5 s) and recovery time (1 s), a low hysteresis value, and good repeatability. The CuO/Ti3C2TX sensor exhibited remarkable properties in human respiration rate monitoring, finger non-contact sensing, and environmental detection. The moisture-sensitive mechanism of CuO/Ti3C2TX was discussed. The fabricated CuO/Ti3C2TX showed great potential in the application of moisture-sensitive materials for ultra-high-performance humidity sensors.
ISSN:2046-2069
DOI:10.1039/d2ra06903b