面向恶臭大气污染物H2S检测的高性能氧化物半导体气体传感器的研究

硫化氢（H2S）是一种毒性极强的恶臭型环境污染气体，开发高性能的气体传感器对实现大气环境中H2S气体的快速准确检测具有重要意义。本项目拟从传感材料的设计制备、功能改性以及器件结构的优化出发，构建基于氧化物半导体纳米传感材料的高性能H2S气体传感器。通过融合“材料结构增感”、“材料改性增感”和测试电极的“结构增感”三级增感策略，提高传感器的灵敏度和选择性；通过抗湿性杂质掺杂和传感材料表面疏水化处理的协同抗湿策略，增强传感器的耐湿性；通过贵金属活化和紫外/可见光活化的协同作用降低传感器的工作温度，从而实现对大气环境中易燃性H2S气体的安全准确检测；系统研究上述增感、抗湿以及降低工作温度策略对传感器性能的调控规律与作用机理，为传感器性能的优化提供理论支撑。本项目的实施不仅有助于构建面向大气污染物H2S气体检测的实用化传感器件，也能为高性能氧化物半导体气体传感器的设计提供新的思路。

Hydrogen sulfide (H2S) is a highly toxic malodorous environmental pollution gas. It is of great significance to develop high-performance gas sensors for the rapidly accurate detection of H2S gas in the atmosphere. The project intends to construct high-performance H2S gas sensors based on semiconductor oxide nanomaterials through designing high-performance sensing materials, modification with functional materials and optimizing the structure of gas sensor. The synergistic sensitization effects of "micro-/nanostructure design of sensing materials", " surface modification of sensing materials " and “structure design of testing electrodes” will be applied to improve the sensitivity and selectivity of the gas sensors; The synergistic strategies of introducing anti-hygroscopic dopants and surface hydrophobic treatment will be used to enhance the anti-humidity properties of gas sensors; The activation treatment strategies with noble metals and UV/visible light will be applied to reduce the working temperature of the gas sensors, which is necessary to realize the safety detection of combustible H2S gas. To provide theoretical support for optimizing the sensing performance, the gas sensing mechanism as well as the effects of the strategies about improving the sensitivity, increasing the humidity resistance and reducing the working temperature will be investigated. Through the implementation of this project, it is not only expected to construct practical gas sensors for the detection of H2S pollutants, but also can provide new routes for the design of high-performance gas sensors based on semiconductor oxides.