Ag修饰CuO纳米片的湿敏特性研究
Study on Humidity Sensing Properties of Ag Modified CuO Nanosheets
摘要: 贵金属负载金属氧化物的湿敏特性一直是近年来研究的热点，本论文采用低温液相法制备CuO纳米片，再以湿化学还原的方法得到了Ag修饰的CuO纳米片复合材料。通过改变前驱体溶液AgNO3的浓度实现对Ag/CuO纳米片复合体系中Ag含量的优化，进而获得最佳湿敏特性的湿敏元件。结果表明，负载Ag后，湿敏元件表现出优良的湿敏特性，当AgNO3的浓度为4 mM时，该湿敏元件达到最佳的感湿性能。在5% RH到95% RH的范围内，复阻抗变化高达4个量级，灵敏度达到1.5 × 104，响应时间为35 s，恢复时间为63 s，湿滞为0.39%，明显高于纯CuO纳米片的湿敏特性。
Abstract: The humidity-sensitive properties of noble metal-supported metal oxides have been a research hotspot in recent years. In this paper, CuO nanosheets were prepared by low-temperature liq-uid-phase method, and Ag-modified CuO nanosheet composites were obtained by wet chemical reduction method. By changing the concentration of AgNO3 in the precursor solution, the content of Ag in Ag/CuO nanosheet composites was optimized, and the humidity sensor with the best humidity sensitivity was obtained. The results show that the humidity sensor has excellent humidity sensitivity after loading Ag. When the concentration of AgNO3 is 4 mM, the humidity sensor achieves the best humidity sensitivity. Within the range of 5% RH to 95% RH, the complex impedance varies by four orders of magnitude, the sensitivity reaches 1.5 × 104, the response time is 35 s, the recovery time is 63 s, and the hysteresis is 0.39%, which is obviously higher than that of pure CuO nanosheets.
文章引用：刘冬梅, 皮明雨, 崔玉亭, 陈坤权, 张丁可. Ag修饰CuO纳米片的湿敏特性研究[J]. 材料科学, 2019, 9(6): 573-579. https://doi.org/10.12677/MS.2019.96073

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