Fabrication of 1D/2D In2O3 nanofibers/Ti3C2TX MXene composites for high performance detection of trimethylamine at low temperature

Abstract

Two-dimensional (2D) nanomaterials have emerged considerable application foreground in gas sensing from their particular structure and surface chemistry. In this paper, one-dimensional (1D) In2O3 nanofibers/2D Ti3C2TX MXene composites were synthesized by electrospinning and hydrothermal method. The gas sensing test results demonstrate that the response value of In2O3 nanofiber/Ti3C2TX MXene gas sensor to 50 ppm trimethylamine at 120 ℃ is 12.44, which is 2.29 times (5.44) that of pure In2O3 nanofiber. Furthermore, the response/recovery process is only 4/3 s, and the gas sensor has good reproducibility and obvious selectivity to trimethylamine, which is due to the large specific surface area provided by the lamellar morphology of Ti3C2TX MXene, the nanofiber structure of In2O3 and the synergistic effect of their p-n heterojunctions. The compound preparation tactics of 1D metal oxide semiconductor and 2D nanomaterials provides a new idea for the preparation of high performance gas sensors.