One pot synthesis of mesoporous ZnO-SiO2 nanocomposite as high performance humidity sensor
One pot synthesis of mesoporous ZnO-SiO2 nanocomposite as high performance humidity sensor
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DOI：
10.1016/j.colsurfa.2015.07.046
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发表时间：
2015-10-20
影响因子：
5.2
通讯作者：
Devi, Sunita
中科院分区：
文献类型：
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作者：
Tomer, Vijay K.;Duhan, Surender;Devi, Sunita
在这项工作中，我们报告了一种简便易行的合成方法，即负载氧化锌的介孔二氧化硅纳米复合材料，用于测量室温下的相对湿度。采用非原位和原位负载法将氧化锌负载到介孔二氧化硅中。研究了采用不同加载工艺制备的纳米复合传感器在25℃、相对湿度为11-98%的大范围湿环境中的响应。采用原位加载工艺制备的纳米复合传感器具有良好的线性、快速的响应时间、快速的恢复时间、可忽略的滞后、良好的重复性和稳定性，表现出类似5阶阻抗变化。分析了传感器在不同相对湿度下的交流奈奎斯特曲线，以了解其感湿机理。我们的研究为实现氧化锌-二氧化硅杂化纳米复合材料制造高性能RH传感器开辟了一条新的途径。(C)2015爱思唯尔B.V.保留所有权利。
In this work, we report a facile synthesis of ZnO loaded mesoporous silica nanocomposite for detecting relative humidity (RH) at room temperature. ZnO was loaded into mesoporous silica using ex situ and in situ loading processes. Response of the nanocomposite sensors synthesized using different loading process were investigated by exposing them to humid environments in wide range of 11-98%RH at 25 degrees C. The sensor utilizing in situ loading process exhibits a similar to 5 orders impedance change along with excellent linearity, quick response time, rapid recovery time, negligible hysteresis, good repeatability and stability. AC nyquist plots of the sensor at different RHs were analyzed to understand the humidity-sensing mechanism. Our study can open a new way for realizing ZnO-SiO2 hybrid nanocomposite for fabrication of high performance RH sensors. (C) 2015 Elsevier B.V. All rights reserved.