High performance CO₂ gas sensor based on noble metal functionalized semiconductor nanomaterials for health and environmental safety

Design, synthesis and fabrication of novel p-n type semiconducting Pd incorporated MoO₃: NiO (MNP) nanocomposite via Hydrothermal protocol and Impregnation method as Carbon-dioxide (CO₂) gas sensing material was demonstrated with efficient conductivity and superior stability. The formation of nanocomposites MoO₃:NiO and MoO₃: NiO: Pd was systematically reviewed and confirmed by x-ray Diffraction (XRD) pattern, x-ray Flurescence Spectroscopy (XRF) and Transmission Electron Microscopy (TEM). A plausible gas sensing mechanism was deduced in terms of adsorption—desorption phenomenon, thus addressing the feasibility and potentiality of MNP nanocomposite engineered for the development of sensitive (S = 96%), selective and stable CO₂ gas sensor. (paper)