Acetone sensing properties of hierarchical WO3 core-shell microspheres in comparison with commercial nanoparticles

International Journal of Nano Dimension

مقاله 9، دوره 7، شماره 3، آبان 2016، صفحه 254-262   

نوع مقاله: Reasearch Paper

شناسه دیجیتال (DOI): 10.7508/ijnd.2016.03.009

نویسندگان

Mostafa Esmaeili¹؛ Gholamreza Kiani^{* 1}؛ Farhad Shahriari Nogorani²؛ Saeed Boroomand¹

¹School of Engineering, Emerging Technologies, University of Tabriz, Tabriz, 5166616471, Iran

²Department of Materials Science and Engineering, Shiraz University of Technology, Shiraz, Iran

چکیده

In this work, hierarchical WO3 core-shell microspheres were synthesized via a facile template-free precipitation method. Gas sensing properties of the synthesized powder to acetone and some other volatile organic compounds were comparatively investigated with commercial WO3 nanoparticles. The synthesized and commercial powders were characterized by X-ray diffraction, scanning electron microscopy, particle size distribution analysis, Brunauer–Emmett–Teller and Barrette-Joyner-Halenda techniques. Gas sensors were fabricated by deposition of powders between/on interdigitated electrodes via sedimentation approach. The results show that both sensors are sufficiently sensitive to detect 1.8 ppm of acetone; diabetes diagnosis threshold in human exhaled breath. Indeed, the hierarchical based one is highly sensitive and more selective to acetone.

کلیدواژه‌ها

Acetone؛ Core-shell microspheres؛ Diabetes؛ Gas sensor؛ Nanoparticles, WO3

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