Synthesis and study of facile grown WO ₃ nanoparticles and its feasible adsorption activity

Tungsten trioxide (WO[Formula: see text] nanoparticles were synthesized using a straightforward liquid-state chemical reaction process. Synthesized particles were annealed at [Formula: see text]C. The annealed sample was examined using several analytical methods. The structural, morphological, stoichiometric, functional and optical properties of the prepared sample have been analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDAX), fourier transform infrared (FTIR) spectroscopy and diffuse reflectance spectroscopy (DRS). XRD confirmed the orthorhombic phase of the WO 3 structure. SEM analysis depicts that the nonuniform plates are loosely bound and form an agglomerated structure with pores. EDAX confirmed the purity of the sample. FTIR spectroscopy studies confirmed the WO 3 formation. The optical band gap was calculated using DRS data and is 2.93[Formula: see text]eV. Moreover, the feasible adsorption activity of the sample, performed at ambient temperature in a dark environment with the prepared solution stirred using a magnetic stirrer at 400[Formula: see text]rpm, demonstrated 98% removal of methylene blue from the aqueous medium in 40[Formula: see text]min.