Pure α-Fe₂O₃ nanotubes and a series of Al₂O₃/α-Fe₂O₃ composite nanofibers were synthesized via facile electrospinning and subsequent calcination at 500 °C in air for 2 h. The morphologies and nanostructures of these samples were characterized through various experimental techniques. It was found that the composite samples were composed of crystal α-Fe₂O₃ and amorphous Al₂O₃. The composite Al₂O₃/α-Fe₂O₃ nanofibers have smaller grain size than that of pure α-Fe₂O₃ nanotubes prepared by the same process. Furthermore, comparative gas sensing investigation between Al₂O₃/α-Fe₂O₃ composite nanofibers and pure α-Fe₂O₃ nanotubes was performed to show the superior sensing properties of the composite samples. When the mass ratio of Al source and Fe source was 1:4, the sensor exhibited the highest response to 100 ppm triethylamine at 250 °C. It is worth noting that the response times were no more than 2 s at operating temperatures ranged from 175 °C to 300 °C. Finally, the related mechanism of gas sensing and the role of Al₂O₃ in the composite nanofibers were discussed in this paper.

纯的α-Fe ₂ ö ₃纳米管等一系列的Al ₂ ö ₃ /的α-Fe ₂ ö ₃复合纳米纤维在空气中通过静电纺丝容易和随后的煅烧合成在500℃下2小时。通过各种实验技术对这些样品的形貌和纳米结构进行了表征。结果发现，复合样品组成晶体的α-Fe的₂ ö ₃和无定形的Al ₂ ö ₃。复合的Al ₂ ö ₃ /的α-Fe ₂ ö ₃纳米纤维具有更小的晶粒尺寸比纯的的α-Fe ₂通过相同的方法制备O ₃纳米管。此外，Al的比较气体感测调查₂ ö ₃ /的α-Fe ₂ ö ₃复合纳米纤维和纯的α-Fe _2个ö ₃进行纳米管以示出复合材料样品的优异传感特性。当铝源和铁源的质量比为1：4时，传感器在250°C下对100 ppm三乙胺的响应最高。值得注意的是，在175°C至300°C的工作温度下，响应时间不超过2 s。最后，介绍了气体传感的相关机理和Al ₂ O ₃的作用。 本文讨论了复合纳米纤维中的纳米粒子。