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    • Morphological and humidity sensing characteristics of SnO2–CuO, SnO2–Fe2O3 and SnO2–SbO2 nanocooxides

      B C Yadav Preeti Sharma P K Khanna

      Volume 34 Issue 4 July 2011 pp 689-698

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      https://www.ias.ac.in/article/fulltext/boms/034/04/0689-0698

    • Keywords

       

      Nanocooxides; humidity sensors; morphology; porous media; XRD; SEM.

    • Abstract

       

      This paper reports the synthesis of SnO2–CuO, SnO2–Fe2O3 and SnO2–SbO2 composites of nano oxides and comparative study of humidity sensing on their electrical resistances. CuO, Fe2O3 and SbO2 were added within base material SnO2 in the ratio 1 : 0.25, 1 : 0.50 and 1 : 1. Characterizations of materials were done using SEM and XRD. SEM images show the surface morphology and X-ray diffraction reveals the nanostructure of sensing materials. The pellets were annealed at 200, 400 and 600°C respectively for 3 h and after each step of annealing, observations were carried out. It was observed that as relative humidity (%RH) increases, there was decrease in the resistance of pellet for the entire range of RH. Results were found reproducible. SnO2–SbO2 shows maximum sensitivity for humidity (12 M𝛺/%RH) among other composites.

    • Author Affiliations

       

      B C Yadav1 Preeti Sharma1 P K Khanna2

      1. Nanomaterials and Sensors Research Laboratory, Department of Physics, Lucknow University, Lucknow 226 007, India
      2. Nanoscience Laboratory, Centre for Materials for Electronics Technology (C-MET), Off Dr. Homi Bhabha Road, Panchawati, Pune 411 008, India

    • Dates

       
      Published
      July 2011
      Manuscript received
      5 February 2010
      Manuscript revised
      22 May 2010

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