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Amperometric CO2 gas sensor based on interconnected web-like nanoparticles of La2O3 synthesized by ultrasonic spray pyrolysis

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Abstract

Thin films of La2O3 were deposited onto glass substrates by ultrasonic spray pyrolysis. Their structural and morphological properties were characterized by X-ray diffraction, Fourier transform Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray photo-electron spectroscopy, Brunauer-Emmett-Teller and optical absorption techniques. The sensor displays superior CO2 gas sensing performance at a low operating temperature of 498 K. The signal change on exposure to 300 ppm of CO2 is about 75%, and the signal only drops to 91% after 30 days of operation.

Schematic diagram of the CO2 gas sensing mechanism of an interconnected web-like La2O3 nanostructure in presence of 300 ppm of CO2 gas and at an operating temperature of 498 K.

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Authors and Affiliations

  1. Thin Film Physics Laboratory, Department of Physics, Shivaji University, Kolhapur, 416004, India

    Anuja A. Yadav & Chandrakant D. Lokhande

  2. Department of electronics and computer engineering, Chonnam National University, Gwangju, 500-757, South Korea

    Vaibhav C. Lokhande

  3. Supercritical Fluids & Nano Processes Laboratory,#302 School of Chemical Engineering, Yeungnam University, 214-1 Dae-dong, Gyeongsan, Gyeongbuk, 712-749, South Korea

    Ravindra N. Bulakhe

Authors
  1. Anuja A. Yadav
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  2. Vaibhav C. Lokhande
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  3. Ravindra N. Bulakhe
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  4. Chandrakant D. Lokhande
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Correspondence to Chandrakant D. Lokhande.

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Yadav, A.A., Lokhande, V.C., Bulakhe, R.N. et al. Amperometric CO2 gas sensor based on interconnected web-like nanoparticles of La2O3 synthesized by ultrasonic spray pyrolysis. Microchim Acta 184, 3713–3720 (2017). https://doi.org/10.1007/s00604-017-2364-3

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  • DOI: https://doi.org/10.1007/s00604-017-2364-3

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