Fabrication of hierarchical Au@Fe2O3-SnO2 core-shell nanotubes with high n-butanol sensing performance

Yuchen Hou, Yongjiao Sun, Wenyuan Zhao, Bingliang Wang, Shizhen Wang, Zhiyuan Lu, Zihan Wei, Wendong Zhang, Koichi Suematsu, Jie Hu

研究成果: ジャーナルへの寄稿学術誌査読

10 被引用数 (Scopus)

抄録

As a typical toxic and hazardous industrial gas, n-butanol poses a potential threat to production safety and human health. It is essential to develop advanced sensors for effectively and reliably detecting n-butanol gas. Herein, hierarchical Au@Fe2O3-SnO2 core-shell nanotubes were prepared and used as functional materials for n-butanol gas sensing. The as-synthesized composites exhibit tube morphology with nanostructures of inner α-Fe2O3 1D nanotubes and outer grown SnO2 films, and Au nanoparticles (NPs) anchored on the surfaces. Au@Fe2O3-SnO2 core-shell nanotubes present high response toward n-butanol compared with pure α-Fe2O3 and Fe2O3-SnO2, and the proportions of Sn and Au were further optimized. The Au2FeSn5 possesses the optimal gas sensing properties both in the relatively dry and humid atmospheres. At the optimum working temperature of 240 ℃ (∼25% RH, ∼22 ℃), Au2FeSn5 sensor presents high response of 45.0 toward 100 ppm n-butanol, fast response/recovery time of 10/5 s, excellent linearity in the concentration range of 0.02–1000 ppm, low theory limitation of detection (LOD) of 2.2 ppb and good reproducibility and stability. The possible sensing enhancement mechanism was proposed from the point of views of gas adsorption and electron transfer. The heterojunctions between two oxides and the sensitization of Au NPs could contribute to the sensitivity to n-butanol detection.

本文言語英語
論文番号135387
ジャーナルSensors and Actuators B: Chemical
406
DOI
出版ステータス出版済み - 5月 1 2024

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 器械工学
  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

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