LPG sensing application of ex situ PPy-Bi2O3-MOX (MOX=ZrO2, Ag2O and TiO2) nanocomposites

Abstract

PPy-Bi₂O₃-MOX (MOX=ZrO₂, Ag₂O and TiO₂) nanocomposites have been synthesized by ex situ approach. PPy-Bi₂O₃-MOX (MOX=ZrO₂, Ag₂O and TiO₂) nanocomposites sensors have been fabricated for LPG sensing application. The nanocomposites have been characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), ultra violet visible spectroscopy (UV-Vis) and thermo gravimetric-differential thermal analyzer (TG-DTA) techniques. SEM micrograph exhibits irregular morphology, appropriate for gas sensing application. XRD reveals that all nanocomposites have amorphous nature. Among all the nanocomposites PBZr (PPy-Bi₂O₃-ZrO₂) nanocomposite sensor has found good LPG sensing performance. PBZr nanocomposite sensor also exhibits better selectivity and stability against LPG. This sensor has low operating temperature against LPG of the order of 323 K and fast response and recovery time.