WO3基的气敏传感器的研究现状及气敏性能提升的机理分析

随着市场对有机挥发性气体检测技术要求的日益提高，金属半导体气敏传感器由于其工作温度较低、循环稳定性好、响应和恢复时间短等特点而受到广泛关注.三氧化钨(WO₃)作为一种典型的n型金属半导体气敏材料，由于其特殊的气敏特性而在探测各类有毒有害物质的领域中受到了人们普遍重视.传感材料的结构和形貌、暴露晶面、金属氧化物和贵金属离子的引入，对改善材料的气敏性能起着关键性的作用.文章介绍了WO₃气敏传感器材料对各种气体的应用，提出基于WO₃的气敏传感器研究过程中所面临的难题，并对其未来发展方向进行了展望.

Research status of WO3 - based gas sensor and mechanism analysis of gas-sensitive performance improvement

With the increasing demand for organic volatile gas detection technology in the market, metal semiconductor gas sensor has attracted wide attention due to its characteristics of low operating temperature, good cycle stability, short response and recovery time. Tungsten trioxide (WO₃), as a typical n-type metal semiconductor gas sensitive material, has been widely paid attention to in the field of detecting various toxic and harmful substances due to its special gas sensitive properties. The structure and morphology of the sensor material, the exposed crystal surface, the introduction of metal oxides and precious metal ions play a key role in improving the gas sensitive properties of the material. This paper introduces the application of WO₃ gas sensor materials to various gases, points out the difficult problems in the research process of WO₃ gas sensor, and looks forward to its future development direction.