The Effect of Shell Thickness on Gas Sensing Properties of Core-Shell Fibers

作者: Ming Zhang, Ning Sui, Rui Wang, Tong Zhang
期刊: Sens. Actuators B
卷号: 2021, 332, 129456
接收日期: 2021-01-04 14:51:24
摘要 Abstract


Cr2O3-TiO2 core-shell fibers (Cr-Ti CS-Fs) with different shell thicknesses were synthesized by a facile coaxial electrospinning technique. The gas-sensitive performance of Cr-Ti CS-Fs to acetone was enhanced by optimizing the TiO2 shell thickness. With the increase of the thickness of the TiO2 shell, the response of Cr-Ti CS-Fs to acetone showed a transition from p-type to n-type. Besides, the formation of Cr2O3-TiO2 heterojunction enabled the gas sensors to possess short response and recovery time to target gas. A possible mechanism of the enhancement of gas-sensitive performance of core-shell Fs was also illustrated.


Core-shell fibers
Coaxial electrospinning
Gas sensor
Shell thickness