NH3 gas sensing performance of ternary TiO2/SnO2/WO3 hybrid nanostructures prepared by ultrasonic-assisted sol-gel method

Ternary TiO2/SnO2/WO3 hybrid nanostructures were prepared by using ultra-sonic assisted sol-gel wet impregnation method, and investigated for NH3 gas sensing applications. The physicochemical properties of the prepared samples were investigated using X-ray diffraction spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, ultra-violet-visible spectroscopy, and X-ray photoelectron spectroscopy. The results showed threefold increase in NH3 gas sensing performance with high selectivity, high response-recovery time at operating temperature 200 A degrees C for ternary TSW-1 NC as compared to its bare, binary and other ternary counterparts. Due to mesoporous morphology of ternary TSW-1 NC and better interconnectivity between metal oxide NPs; NH3 molecule adsorbed efficiently on the surface as well as in interior part of lattice matrix, which resulted into a good sensing response.