Enhanced n-Butanol Sensing Properties Based on Y-Doped BiFeO3 Nanofibers

Effective detection of n -butanol is essential for human health and environmental protection. Bismuth ferrite is a gas-sensitive material candidate with excellent potential, and rare earth element doping is an effective modification strategy to enhance the gas-sensitive performances of gas sensors. In this work, a series of Y-doped BiFeO 3 nanofibers (BFO, 1% Y-BFO, 3% Y-BFO, and 5% Y-BFO) were prepared by electrospinning. Among them, the gas sensors based on 3% Y-BFO nanofibers exhibited significantly enhanced gas-sensing performances for n -butanol. At an optimum operating temperature of 150°C, the synthesized 3% Y-BFO sensor has a response of 60.2 and a response/recovery time of 9/47 s for 100 ppm n -butanol. In addition, it has a lower limit of detection as low as 0.5 ppm and excellent repeatability. Therefore, gas sensors based on Y-doped BiFeO 3 nanofibers represent a promising solution for the efficient detection of n -butanol.