MnO₂-SnO₂ Based Liquefied Petroleum Gas Sensing Device for Lowest Explosion Limit Gas Concentration

In this work, MnO 2 -SnO nanocomposite based below lower exposure limit (0.5–2.0 vol%) sensing device for liquefied petroleum gas (LPG) is reported. The synthesized material highly crystalline with an average crystallite size of 16.786 nm, confirmed by the X-ray diffraction pattern. Williamson-Hall plot shows that induced strain 2.627 × 10 ?4 , present in nanocomposite, lies between strains both its constituents. XRD pattern contains cubic phase and tetragonal SnO . Tauc optical energy band gap 2, 3.407 eV, 3.037 3.202 eV respectively. surface morphological investigation brush-like structure which enhances sensor performance providing activation sites. dispersive (EDS) spectrum found materials are pure because other peaks not observed. functional group analysis using FTIR to be Sn–O Mn–O vibration bands existed. highest response was 2.42 2.0 vol% whereas a concentration 0.5 observed 1.44. fast recovery were to17.30 23.25 s respectively LPG.