Fabrication and Characterization of W-Substituted ZnFe2O4 for Gas Sensing Applications

A sol–gel technique was successfully employed in creating pure and W-substituted zinc ferrite, with nominal compositions of ZnFe2−2xWxO4 (0.0 ≤ x 0.15). For the purposes investigating physical chemical properties generated powders, several analytical techniques were used. In TEM images all compositions, mixed-shaped particles (cubic, spherical, hexagonal) observed. The crystallite size decreases from 82 nm (x = 0.0) to 32 0.15) an increase W doping contents ZnFe2O4 lattice. microstrain increases increasing content. Furthermore, surface area ZnFe2O4, 0.05 W-ZnFe2O4, 0.10 0.15 W-ZnFe2O4 NPs calculated as being 121.5, 129.1, 134.4 143.2 m2 g−1, respectively, a mesoporous pore structure for ferrite samples. BJH distribution within range 160 205 Å. All W-doped samples show H-M loops paramagnetic characteristics. magnetization (M) directly by applied field (H) without achieving saturation up 20 kA/m. comparison, at kA/m gradually Among synthesized samples, demonstrated highest sensitivity towards acetone gas 350 °C.