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SILAR synthesis of SnO2–ZnO nanocomposite sensor for selective ethanol gas

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Abstract

SnO2–ZnO nanocomposite is synthesized at room temperature using the successive ionic layer adsorption and reaction (SILAR) method. The X-ray diffraction (XRD) patterns of annealed films confirms the formation of SnO2–ZnO nanocomposite. Scanning electron microscopy depicts the porous agglomerated nanoparticle network-like structure of the SnO2–ZnO nanocomposite. On the other hand, ZnO has a cauliflower shape, while SnO2 has a distributed agglomerated nanoparticle-like morphology. Energy dispersive X-ray spectroscopy (EDS) confirms the elemental compositions of composite films. The reducing gases such as liquefied petroleum gas, ethanol, hydrogen sulphide and ammonia were detected using a SnO2–ZnO nanocomposite sensor. Ethanol has a maximum sensitivity of 56.93% at a temperature of 275°C and a concentration of 24 ppm. In addition, as compared to a bare sensor, a composite sensor responds quickly. The n–n heterojunction at intergrain boundaries is responsible for better composite performance over bare sensors. Even at low gas concentrations, the SnO2–ZnO nanocomposite sensor is found selective towards ethanol.

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Authors and Affiliations

  1. DIST-FIST Sponsored Material Research Laboratory, Department of Chemistry, Jaysingpur College, Kolhapur, 416101, India

    K S Pakhare & B M Sargar

  2. Department of Chemistry, Anandibai Raorane Arts, Commerce and Science College, Sindhudurg, 416810, India

    K S Pakhare

  3. Department of Physics, Sanjeevan Engineering and Technology Institute, Kolhapur, 416201, India

    S S Potdar

  4. DST-INSPIRE Faculty, D. Y. Patil University, Kolhapur, 416006, India

    U M Patil

  5. Department of Physics, Jaysingpur College, Kolhapur, 416101, India

    R D Mane

Authors
  1. K S Pakhare
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  2. B M Sargar
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  3. S S Potdar
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  4. U M Patil
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  5. R D Mane
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Correspondence to B M Sargar.

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Pakhare, K.S., Sargar, B.M., Potdar, S.S. et al. SILAR synthesis of SnO2–ZnO nanocomposite sensor for selective ethanol gas. Bull Mater Sci 45, 68 (2022). https://doi.org/10.1007/s12034-021-02649-2

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  • DOI: https://doi.org/10.1007/s12034-021-02649-2

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