期刊
MATERIALS LETTERS
卷 147, 期 -, 页码 54-57出版社
ELSEVIER
DOI: 10.1016/j.matlet.2015.01.154
关键词
Humidity; Sensor; Three-dimensional cubic mesoporous silica; Electronic materials
资金
- Innovative Research Team in University [IRT13018]
- State Key Laboratory of Transducer Technology [SKT1402]
- China Postdoctoral Science Foundation [2014T70289, 2012M510878]
- Natural Science Foundation Committee NSFC [51102109]
- Program for Science and Technology Development [20110725]
- Jilin Province Department of Education Science and Technology Project
Lithium chloride (LiCl)-loaded 3D cubic mesoporous silica KIT-6 (LiCl-KIT-6) composites were prepared as resistance-type humidity-sensitive materials. The structures of the resultant composites were characterized by X-ray diffraction, N-2 adsorption-desorption, and transmission electron microscopy. The humidity sensors based on LiCl-KIT-6 composites were fabricated and the sensing properties were investigated. Results indicate the uniform pore distribution of KIT-6 contributes to the rapid hydrone transport in mesoporous channels. The impedance of optimized 3 wt% LiCl-KIT-6 sensor changed by more than three orders of magnitude over the relative humidity range of 11-95%. The response and recovery times of the sensor were 15 s and 28 s, respectively. Finally, the complex impedance method was used to analyze the humidity sensing mechanism of the sensor based on LiCl-KIT-6. (C) 2015 Elsevier B.V. All rights reserved.
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