A self-powered gas sensor based on PDMS/Ppy triboelectric-gas-sensing arrays for the real-time monitoring of automotive exhaust gas at room temperature
A self-powered gas sensor based on PDMS/Ppy triboelectric-gas-sensing arrays for the real-time monitoring of automotive exhaust gas at room temperature
复制标题
基于PDMS/Ppy摩擦电气体传感阵列的自供电气体传感器，用于室温下汽车尾气的实时监测
DOI：
10.1007/s40843-019-9445-9
复制
发表时间：
2019-10-01
影响因子：
8.1
通讯作者：
Xue, Xinyu
中科院分区：
文献类型：
--
作者：
He, Haoxuan;Zhang, Mengyang;Xue, Xinyu
设计了一种用于汽车尾气实时监测的新型自供电主动式气体传感器。管状器件由聚二甲基硅氧烷/聚吡咯（PDMS/Ppy）摩擦电气敏单元阵列制成。气体传感单元可以主动地将气流的机械能转换成摩擦电流。输出电流信号取决于气流中目标化学气体（CO、NH3、NO）的种类和浓度，因此可以用作感测信号。该装置由七个具有不同Ppy衍生物的气敏单元组成。由于不同的感测单元以不同的方式响应气体，因此该设备可以区分气体种类。其工作机理归因于PDMS/Ppy的摩擦电效应与Ppy的气敏性能之间的耦合作用。该装置可以安装在汽车的排气管中，因此可以真实的实时分析废气，而不需要任何外部电力。本研究结果为汽车尾气监测系统的发展提供了一个新的研究方向，从而在大气污染检测中发挥重要作用。
A new self-powered active gas sensor for real-time monitoring of automotive exhaust gas was devised. The pipe-shaped device was fabricated from polydimethylsiloxane/polypyrrole (PDMS/Ppy) triboelectric gas-sensing unit arrays. The gas-sensing units can actively convert the mechanical energy of gas flow into a triboelectric current. The output current signal depends on the species and concentrations of the target chemical gases (CO, NH3, NO) in the gas flow, and thus can be used as a sensing signal. The device consists of seven gas-sensing units with different Ppy derivatives. As the different sensing units respond to the gases in different ways, the device can differentiate between gas species. The working mechanism is attributed to the coupling effect between the triboelectric effect of PDMS/Ppy and the gas-sensing properties of Ppy. The device can be installed in the tailpipe of an automobile, and can thus analyze the exhaust gas in real time without the need for any external electrical power. The results of the present study spur a new research direction for the development of automotive exhaust gas monitoring systems, thus playing an important role in the detection of air pollution.