【摘要】 研制具有高灵敏度、低检测限的丙酮气体传感器对于工业生产安全和人体疾病诊断具有重要意义。本文以生物质脱脂棉为模板，采用金属盐溶液浸泡法和空气中煅烧处理相结合的策略制备了α-Fe₂O₃微米管，然后采用X射线衍射仪、热重分析仪、扫描电子显微镜（SEM）对α-Fe₂O₃的物相组成与表面形貌进行表征。所制备的α-Fe₂O₃传感器表现出优异的丙酮传感性能，包括高响应(192.51%@20×10^-6),低检测限(1×10^-6),优异的重复性和选择性，并分析传感器的敏感机制。该工作不仅为多孔金属氧化物材料的简便设计提供了方案，而且在构建用于高性能丙酮气体检测系统方面具有应用潜力。更多还原

【Abstract】 Development of acetone gas sensor with high sensitivity and low detection limit is of great significance for industrial production safety and human disease diagnosis.α-Fe₂O₃ microtubes are prepared by soaking in metal salt solution and calcining in air using biomass absorbent cotton as template, and then the phase composition and surface morphology of α-Fe₂O₃ are characterized by X-ray diffractometer, thermogravimetric analyzer and scanning electron microscope（SEM）.The prepared α-Fe₂O₃ sensor shows excellent acetone sensing performance, including high response(192.51 %@20×10^-6),low detection limit(1×10^-6)and excellent repeatability and selectivity, and the sensing mechanism of the sensor is also analyzed.This work not only provides solution for the design of porous metal oxide materials, but also has application potential in the construction of high-performance acetone gas detection system.更多还原