Comparative study of carbon dioxide sensing by Sn-doped TiO2 nanoparticles synthesized by microwave-assisted and solid-state diffusion route

Gas sensor based on Sn-doped titanium dioxide (TiO2) nanoparticles has been fabricated and evaluated for carbon dioxide (CO2) sensing. The Sn-doped TiO2 nanoparticles were synthesized by microwave-assisted and solid-state diffusion route. The structure and morphology of resulting samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Ultraviolet-visible (UV-VIS) spectroscopy was employed to study the optical properties. The weight loss of samples was analyzed through thermo gravimetric analysis (TGA). The Sn-doped TiO2 nanoparticles synthesized through microwave route exhibited good sensing characteristics.