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Abstract
Over the past few years, considerable interest has been focused on semiconducting nanoparticles due to
their potential applications in diverse fields including catalysis, magnetic recording media,
microelectronics, gas sensors, etc. In our present study, we describe the design, fabrication and gas sensing
performance of p-NiO/n-MoO3 (MN) nanocomposites functionalized by noble metal Au (MNA) in order to
develop a reliable sensor for CO2 gas detection since it is odorless, highly hazardous and toxic green house
gas which affects the environment and human health. The formation of the nanocomposite was
systematically reviewed and confirmed by X-Ray Fluorescence Spectroscopy (XRF) and X-Ray Diffraction
(XRD) patterns. The MN nanocomposite impregnated with noble metal – Au (MNA) showed better
efficiency of S=87.86% towards Carbon dioxide (CO2) gas compared to MN (S=80%) and selectivity
towards CO2 in comparison to other interfering gases with superior stability.
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