CAJ | 학술논문

家用燃气事故、汽车尾气和工业废气等问题日趋严重，传统气敏材料已很难满足对气体监测越来越高的要求，纳米结构α-Fe2O3因其热稳定性好、选择性好，以及无毒、抗腐蚀性强、环境友好、价格低廉等已成为最重要的气敏材料之一.采用简单的热氧化法成功制备了α-Fe2O3纳米线.纳米线平均直径为20~50 nm，长度可达1~5μm；以制备的α-Fe2O3纳米线为探测材料的气敏元件在50×10-6乙醇气氛中的最佳工作温度为383°C，灵敏度可达2.4，响应和恢复时间分别为13 s和6 s.基于α-Fe2O3纳米线制备的气敏元件在乙醇中的气敏机理为表面电阻控制型.
가용연기사고、기차미기화공업폐기등문제일추엄중，전통기민재료이흔난만족대기체감측월래월고적요구，납미결구α-Fe2O3인기열은정성호、선택성호，이급무독、항부식성강、배경우호、개격저렴등이성위최중요적기민재료지일.채용간단적열양화법성공제비료α-Fe2O3납미선.납미선평균직경위20~50 nm，장도가체1~5μm；이제비적α-Fe2O3납미선위탐측재료적기민원건재50×10-6을순기분중적최가공작온도위383°C，령민도가체2.4，향응화회복시간분별위13 s화6 s.기우α-Fe2O3납미선제비적기민원건재을순중적기민궤리위표면전조공제형.
The traditional gas-sensitive materials has been difficult to meet the increasing demands in gas monitoring because of the more and more serious problems in domestic gas , vehicle exhaust and industrial emissions. α-Fe2O3 nanostructures become one of the most important gas-sensitive materials due to its good thermal stability, high selectivity, non-toxic, anti-corrosive, environmental friendliness and low price. Herein, single monoclinic crystalline α-Fe2O3 nanowires are synthesized by simple thermal oxidation. α-Fe2O3 nanowires have an average 20~50 nm in diameters, and a length up to 1~5 μm. The optimum working temperature is about 383 ° C and sensitivity is up to 2.4 in 50 ppm ethanol atmosphere. The corresponding recovery and response time were 13 s and 6 s, respectively. Gas sensing mechanism in ethanol for the sensor based onα-Fe2O3 nanowires are surface resistivity controlled type.