Ammonia Gas Sensing Properties of Bismuth Oxide Thick Films and Its Structural, Optical, Morphological Characterization

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2024年11月14日

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Mahendra S. Shinde,
Abhinay S. Mandawade,
Manoj A. More,
Swapnil S. Tayade,
Laxman N. Bhoy,
Ganesh E. Patil

摘要

Abstract

This paper successfully synthesized Bismuth oxide (Bi₂O₃) nanoparticles (NPs) using the sol–gel method as Bismuth nitrate pentahydrate as a precursor. The average crystallite size of the NPs was characterized by X-ray diffraction (XRD) analysis and the size of the NPs found to be 17 nm. For the band gap measurement UV-visible spectra of NPs were recorded and it was found to be 2.7 eV. The surface morphology of Bi₂O₃ NPs was examined through field emission scanning electron microscopy (FESEM) showing spherical nature-like morphology. The gas sensor was fabricated using as-prepared Bi₂O₃ NPs by standard screen-printing technique and it was tested for various gases such as NH₃, NO₂, ethanol, LPG, and methanol as a function of operating temperature. The effect of operating temperature and gas concentration were investigated in detail to understand Bi₂O₃ NPs sensor for NH₃ gas and found to be very efficient.