High performance hydrazine vapor sensor based on redox mechanism of twisted perylene diimide derivative with lower reduction potential
High performance hydrazine vapor sensor based on redox mechanism of twisted perylene diimide derivative with lower reduction potential
复制标题
基于低还原电位扭曲苝二酰亚胺衍生物氧化还原机理的高性能肼蒸气传感器
DOI：
10.1016/j.snb.2016.08.090
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发表时间：
2017-02-01
影响因子：
8.4
通讯作者：
Zhang, Haiquan
中科院分区：
文献类型：
--
作者：
Wang, Jianmin;He, Enfang;Zhang, Haiquan
报道了一种基于低还原电位(E-1/2(PdI/PdI中心点(-))=-0.098 V和E-1/2(PdI中心点(-)/PdI2-)=-0.360 V)的溶液处理方法制备的常温下用于联氨(NH_2NH_2)蒸气检测的电导薄膜装置。该膜器件对肼蒸气具有很高的选择性、重复性和超快响应，在肼蒸气下具有线性浓度依赖特性。然而，薄膜器件在高浓度(800ppm)肼下不稳定，这归因于扫描电子显微镜图像结合UV-Vis光谱显示暴露在800ppm肼蒸气前后的薄膜形貌的变化。此外，还讨论了薄膜厚度、工作电压、相对湿度和温度对传感性能的影响。此外，通过紫外-可见光谱、光谱电化学和循环伏安等方法研究了薄膜器件对肼蒸气的传感机理，表明d-THBPDI的氧化还原在传感过程中起着关键作用。(C)2016爱思唯尔B.V.保留所有权利。
A conductometric film device prepared using solution processing method based on a perylene diimide derivative with low reduction potentials (E-1/2(PDI/PDI center dot(-))= -0.098 V and E-1/2 (PDI center dot(-)/PDI2-)=-0.360 V) for detection of hydrazine (NH2NH2) vapors under ambient conditions is reported. The film device exhibited highly selectivity, reproducibility and ultrafast response towards hydrazine vapor with liner concentration-dependent characteristic under hydrazine vapor. However, the film device is unstable under high concentration (800 ppm) of hydrazine, which ascribed to the change of the film morphology demonstrated by SEM images combined with UV-vis spectra before and after exposed to 800 ppm hydrazine vapors. In addition, the effect of the film thick, the working voltages, relative humidity and temperature on the sensing performance were also discussed. Furthermore, the sensing mechanism of the film device to hydrazine vapor was investigated by UV-vis spectra, spectroelectrochemistry and cyclic voltammetry, which indicated that the redox of d-THBPDI plays a critical role in the sensing process. (C) 2016 Elsevier B.V. All rights reserved.