Humidity-sensing properties of LiCl-loaded 3D cubic mesoporous silica KIT-6 composites
Humidity-sensing properties of LiCl-loaded 3D cubic mesoporous silica KIT-6 composites
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DOI：
10.1016/j.matlet.2015.01.154
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发表时间：
2015-05
影响因子：
3
通讯作者：
Hongran Zhao;Sen Liu;Rui Wang;Tong Zhang
中科院分区：
文献类型：
--
作者：
Hongran Zhao;Sen Liu;Rui Wang;Tong Zhang
制备了一种负载LiCl的三维立方介孔氧化硅KIT-6（LiCl-KIT-6）复合材料作为电阻型湿敏材料。通过X射线衍射、N2吸附-脱附和透射电镜对复合材料的结构进行了表征。制备了基于LiCl-KIT-6复合材料的湿敏元件，并对其传感性能进行了研究。结果表明，KIT-6均匀的孔分布有助于水在介孔通道中的快速传输。优化的3重量% LiCl-KIT-6传感器的阻抗在11- 95%的相对湿度范围内改变超过三个数量级。传感器的响应时间和恢复时间分别为15 s和28 s。最后，采用复阻抗法分析了LiCl-KIT-6湿敏元件的感湿机理。
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, N2adsorption–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.