• ZnO–TiO2 nanocomposite: Characterization and moisture sensing studies

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      https://www.ias.ac.in/article/fulltext/boms/035/03/0347-0352

    • Keywords

       

      Sensor; humidity; TiO2; ZnO; XRD; SEM.

    • Abstract

       

      This paper reports morphological and relative humidity sensing behaviour of ZnO–TiO2 nanocomposite powder pellets obtained through solid-state reaction route. Resistance of the pellets is observed to decrease with increase in relative humidity in the 10–90% range. Sensing element with 15 wt%of TiO2 in ZnO shows best results with a sensitivity of 9.08 M𝛺/%RH in 10–90% relative humidity range. This sensing element manifests crystallite size of 71 nm as measured from XRD and average grain size of 207 nm calculated from SEM micrograph. This sensing element manifests low hysteresis, less effect of ageing and good reproducibility. Response and recovery times of this sensing element are measured to be 84 s and 396 s, respectively.

    • Author Affiliations

       

      N K Pandey1 K Tiwari1 Akash Roy1

      1. Department of Physics, University of Lucknow, Lucknow 226 007, India
    • Dates

       
  • Bulletin of Materials Science | News

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