Oxygen Vacancy-Rich Bimetallic Au@Pt Core–Shell Nanosphere-Functionalized Electrospun ZnFe 2 O 4 Nanofibers for Chemiresistive Breath Acetone Detection

Sensitive and selective acetone detection is of great significance in the fields of environmental protection, industrial production, and individual health monitoring from exhaled breath. To achieve this goal, bimetallic Au@Pt core–shell nanospheres (BNSs) functionalized-electrospun ZnFe2O4 nanofibers (ZFO NFs) are prepared in this work. Compared to pure NFs-650 analogue, the ZFO NFs/BNSs-2 sensor exhibits a stronger mean response (3.32 vs 1.84), quicker response/recovery speeds (33 s/28 s vs 54 s/42 s), and lower operating temperature (188 vs 273 °C) toward 0.5 ppm acetone. Note that an experimental detection limit of 30 ppb is achieved, which ranks among the best cases reported thus far. Besides the…

• NN
  National Natural Science Foundation of China

  Award: 61704014
• CU
  Chongqing University

  Award: gnkf2023003
• GS
  Graduate School, Chongqing University

  Award: CYS22110
• FA
  Fundamental and Frontier Research Project of Chongqing

  Award: CSTB2023NSCQ-MSX0231