Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Bio-inspired Cr2O3 and Co3O4 Nanoparticles Loaded Electrospun WO3 Nanofiber Chemical Sensor for Early Diagnosis of Halitosis

고분산성 Cr2O3 및 Co3O4 전이금속 나노입자 촉매가 기능화된 다공성 WO3 나노섬유를 이용한 구취진단용 화학센서

  • Jang, Ji-Soo (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Kim, Sang-Joon (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Choi, Seon-Jin (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Koo, Won-Tae (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Kim, Il-Doo (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST))
  • Received : 2016.05.21
  • Accepted : 2016.05.31
  • Published : 2016.05.31
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Abstract

In this work, we prepared porous WO3 nanofibers (NFs) functionalized by bio-inspired catalytic $Cr_2O_3$ and $Co_3O_4$ nanoparticles as highly sensitive and selective $H_2S$ gas sensing layers. Highly porous 3-dimensional (3D) NFs networks decorated by well-dispersed catalyst NPs exhibited superior $H_2S$ gas response ($R_{air}/R_{gas}$ = 46 at 5 ppm) in high humidity environment (95 %RH). In particular, the sensors showed outstanding $H_2S$ selectivity against other interfering analytes (such as acetone, toluene, CO, $H_2$, ethanol). Exhaled breath sensors using $Cr_2O_3$ and $Co_3O_4$ catalysts-loaded $WO_3$ NFs are highly promising for the accurate detection of halitosis.

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References

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