TotalNOx/NH3锆基传感器阵列的研发及相关传感机理探究

Recently, air pollutants, particulary nitric oxides (NOx) has caused serious problems in hunman health and ecological enviroment. In order to dispose of this problem, it is necessarry to develop gas sensors which can be utilized for precisely detecting the amount of NOx and NH3 existing in vehicle & industrial exhaust.In this research, a new way of developing zirconia-based total NOx sensors has been proposed, whilst, strategy for improving the performance of newly developed zirconia-based NH3 sensor was also referred, by fellowing steps of (1) sensing mechanism of these proposed sensing-electrodes towards NOx/NH3 will be throughly studied;(2)the sening-electrode of NH3 sensor will be made by Ship in Bottle Method ;(3) high-performance NOx/NH3 sening-electrodes will be screened so that to fabricate a zirconia-based combined-type total NOX and NH3 sensor array;(4)spcies and amount of total NOX and NH3 will be qualitative and quantative diagnosised by the fabricated sensor array. In general, it is expected that this research will provide technique and theoretical support for developing smart high-performance zirconia-based total NOx/NH3 sensor array.

当前对我国影响极大的雾霾天气与NOx的过度排放密不可分，NOx催化还原减排技术要求精确获知汽车尾气和化石能源燃烧中产生的NOx浓度和NH3的注入量，因此，研发高效的NOx和NH3传感器已成为该减排技术的迫切需求。本研究拟开展（1）敏感电极材料对NOx/NH3组分响应机理的研究；（2）采用"瓶中造船技术"制备 NH3传感器电极；（3）利用筛选出的对NOx/NH3有高效响应的敏感电极材料构建出一个combine-type结构的total NOx/NH3锆基传感器阵列；（4）定性定量评价total NOx/NH3锆基传感器阵列的工作性能。力争通过本项目的研究，研发出能在高温、高湿工作条件下对total NOx和NH3进行高效测量的锆基传感器阵列。

NOx 催化还原减排技术（SCR)催生了对NOx和 NH3传感器的需求，因此，研发高效的 NOx 和 NH3 传感器已成为该减排技术的迫切需求。本研究基于新工作理念的电流/电位型锆基传感器阵列，以实现在极端工作条件下快速、准确、长期高效监测total NOx和NH3的目标，对该电流/电位式锆基total NOx/NH3敏感器件的响应机理加以深入研究，具体开展了（1）敏感电极材料对 NOx/NH3 组分响应机理的研究；（2）实现了氧化铝与YSZ的叠层共烧及基于流延共烧法传感器的研究；（3）实现了PPB级锆基安培型NO气体传感器的研发；（4）研发出复杂环境下混合气体中对total NOx和NH3高效响应的电流/电位式锆基传感器阵列；（5）利用传感器阵列和神经网络对混合挥发性有机化合物组份测量研究。通过本项目的研究，研发出能在高温、高湿工作条件下对 total NOx 和 NH3 进行测量的锆基传感器阵列。