Sensing of acetone by Al-doped ZnO

Ran Yoo, Andreas T. Güntner, Yunji Park, Hyun Jun Rim, Hyun Sook Lee, Wooyoung Lee

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Abstract

The development of chemoresistive gas sensors for environmental and industrial air monitoring as well as medical breath analysis is investigated. Flame-made ZnO nanoparticles (NPs) doped with 1 at% Aluminum exhibited higher sensing performance (response 245, response time ∼ 3 s, and sensitivity 23 ppm−1) than pure ZnO and those made by a hydrothermal method (HT) (56, ∼ 12 s, and 4 ppm−1) for detection of 10 ppm acetone. Furthermore, their sensing response of ∼10 to 0.1 ppm of acetone at 90% RH is superior to other metal oxide sensors and they feature good acetone selectivity to other compounds (including NH3, isoprene and CO). Characterization by N2 adsorption, X-ray photoelectron and UV–vis spectroscopies reveals that the improved sensing performance of flame-made Al-doped ZnO NPs is associated primarily to a higher density of oxygen vacancies than pure ZnO and all HT-made NPs. This leads to a greater number of adsorbed oxygen ions on the surfaces of Al-doped ZnO NPs, which can react with acetone molecules.

Original languageEnglish
Pages (from-to)107-115
Number of pages9
JournalSensors and Actuators, B: Chemical
Volume283
DOIs
Publication statusPublished - 2019 Mar 15

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

Yoo, R., Güntner, A. T., Park, Y., Rim, H. J., Lee, H. S., & Lee, W. (2019). Sensing of acetone by Al-doped ZnO. Sensors and Actuators, B: Chemical, 283, 107-115. https://doi.org/10.1016/j.snb.2018.12.001