A Systematic Investigation into WO₃ Nanoparticles in Pellet Form for Gas Sensing Applications

This work focuses on the study of properties of Tungsten trioxide (WO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> ) nanoparticles in pellet form towards gas sensing applications. WO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> pellets were prepared using commercial nanopowder by hydraulic press and annealed at 300°C and 500°C for 1 hour. The structural, morphological, optical and Compositional properties of un-annealed and annealed nanoparticle are examined using Scanning Electron Microscope (SEM), X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), UV-visible spectroscopy and Energy Dispersive X-Ray (EDX) studies. The dielectric properties in its pellet form were recorded at different frequencies from 10 Hz to 8MHz at various temperatures using an LCR meter. These prepared pellets are used for gas-sensing applications.