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Structural and sensing properties of ethanol gas using Pd-doped SnO2 thick film gas sensor

  • Recent Trends in Environment and Sustainable Development
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Abstract

In the present study, we fabricate undoped and 1 wt% palladium (Pd)-doped tin oxide (SnO2) films were deposited on alumina substrate using screen printing technology. The deposited sensing film is characterized and its microstructural properties are studied using X-ray diffraction (XRD) and atomic force microscope (AFM). The crystallite size, grain size, and roughness parameter decrease with Pd doping. It was ~ 23.5 nm and ~ 19.2 nm for undoped and Pd-doped SnO2 film samples. The response of fabricated thick film sensor for 1 wt% Pd-doped SnO2 is maximum (~ 71) with varying concentrations of ethanol (5000 ppm) at operating temperature 473 K. The response/recovery time is observed and it is ~ 41 s/125 s. The reduction in crystallinity and roughness leads to improves sensing behavior towards ethanol gas. The sensing mechanism and response behavior is explained based on a theoretical model.

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Acknowledgments

The authors are thankful to UGC-DAE CSR, Indore, for providing XRD and AFM measurements. Authors also acknowledge with thanks to CSIR New Delhi providing JRF and SRF fellowship.

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Authors and Affiliations

  1. Thin Film Laboratory, Department of Physics, Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, Uttar-Pradesh, 273009, India

    Ankit Kumar Vishwakarma & Lallan Yadava

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  1. Ankit Kumar Vishwakarma
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  2. Lallan Yadava
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Correspondence to Ankit Kumar Vishwakarma.

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Vishwakarma, A.K., Yadava, L. Structural and sensing properties of ethanol gas using Pd-doped SnO2 thick film gas sensor. Environ Sci Pollut Res 28, 3920–3927 (2021). https://doi.org/10.1007/s11356-020-10211-6

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  • DOI: https://doi.org/10.1007/s11356-020-10211-6

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