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WO3 mono-nanocrystals: Synthesis, characterization and evaluation of their electrical behavior in oxygen and acetone atmospheres

2021; Elsevier BV; Volume: 274; Linguagem: Inglês

10.1016/j.mseb.2021.115472

1873-4944

Juan David Muñoz-Bolaños, Jorge Enrique Rodríguez Páez,

Advanced Chemical Sensor Technologies

• WO 3 nanoparticles were synthesized using the modified polymer complex method. • WO 3 synthesized contained monocrystalline primary particles with a size of ∼30 nm. • The effect of the acetone and oxygen on the electrical behavior of WO 3 were evaluated. • The sensitivity of the WO 3 pieces in the presence of O 2 was favorable. • WO 3 pieces showed good sensitivity to the presence of acetone. WO 3 nanoparticles were synthesized using the modified polymer complex method. The synthesized powders were characterized using infrared and UV–Vis absorption spectroscopy, X-ray diffraction (XRD), photoluminescence (PL), scanning (SEM) and transmission (TEM) electron microscopies. Results revealed the synthesized WO 3 particles are monocrystalline, with a monoclinic structure (space group P21/c) and a size of 30 nm, a gap of 2.8 eV with structural defects promoting gas sensing. Using these powders, ceramic pieces were formed by the slip casting method and the sintered pieces evaluated for their electrical behavior in the presence of oxygen and acetone vapors. The favorable ability of WO 3 to sense these gases and its potential use by way of acetone sensing in the diagnosis of diseases such as diabetes mellitus were reiterated in light of the results obtained in this trial.