Gas sensitivity of ZnO:Mn nanocrystals to hydrogen

Authors

  • O.V. Kovalenko Oles Honchar Dnipro National University, Dnipro, Ukraine
  • V. Yu. Vorovsky Oles Honchar Dnipro National University, Dnipro, Ukraine
  • V. V. Slavnyi Oles Honchar Dnipro National University, Dnipro, Ukraine

DOI:

https://doi.org/10.15421/332310

Keywords:

gas sensors, ZnO nanocrystals, X-ray phase analysis, EPR spectra, hydrogen heat treatment, sensitivity

Abstract

In this work, the effect of hydrogen heat treatment of ZnO:Mn nanocrystal samples obtained by ultrasonic aerosol pyrolysis on their physical and sensory properties is investigated. It is found that hydrogen heat treatment leads to the appearance of an absorption line of abnormal intensity in the EPR spectrum of ZnO:Mn nanocrystals, indicating the presence of a large number of defects. The possibility of improving the gas sensitivity of ZnO:Mn nanocrystals by thermal treatment with hydrogen is demonstrated. This method of modifying the surface of nanocrystals also allows significantly reducing the operating temperature of gas sensors.

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Published

21-12-2023

Issue

Vol. 31 No. 1 (2023)

Section

Articles