Preparation and Performance Analysis of Ag/ZnO Humidity Sensor.
Preparation and Performance Analysis of Ag/ZnO Humidity Sensor.
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DOI：
10.3390/s21030857
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发表时间：
2021-01-28
期刊：
影响因子：
--
通讯作者：
Zhang H
中科院分区：
文献类型：
--
作者：
Li P;Yu S;Zhang H
采用水热合成法制备了高灵敏度银修饰氧化锌湿度传感器，并对其机理进行了研究。实验结果表明，ag修饰ZnO可以有效地提高湿度传感器的性能。当Ag+与Zn2+的摩尔比为1:100时，在材料表面产生大量的氧空位和许多活性位点，可以加速材料表面水分子的分解，从而提高湿度传感器的响应。此外，纳米银的加入大大提高了ZnO湿度传感器的线性度。与以往报道的ZnO湿度传感器相比，Ag/ZnO湿度传感器具有更好的响应（151,700%）、良好的线性、低的滞后（3%）和短的响应/恢复时间（36/6 s）。同时，发现光对Ag/ZnO的性能影响不大。因此，这种性能稳定、性能优异的ZnO传感器有望用于常规环境下的相对湿度检测。
Highly sensitive silver (Ag) modified zinc oxide (ZnO) humidity sensors were prepared by hydrothermal synthesis and the mechanism was studied. Experimental results show that Ag-modified ZnO can effectively enhance the performance of a humidity sensor. Large number of oxygen vacancies and many active sites are generated on the surface when molar ratio of Ag+ to Zn2+ is 1:100, which can accelerate the decomposition of water molecules on surface of the material, thereby improving the response of humidity sensor. Moreover, the linearity of ZnO humidity sensor is greatly improved by silver nanoparticles. Compared with previously reported ZnO-based humidity sensors, Ag/ZnO humidity sensors have a better response (151,700%), good linearity, low hysteresis (3%), and short response/recovery time (36/6 s). At the same time, it is found that the light had little effect on the performance of Ag/ZnO. Therefore, this kind of ZnO sensor with stable performance and excellent performance is expected to be used in the detection of relative humidity in conventional environments.
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